Merge branch 'master' into comparisons

310 files changed, 687 insertions, 298 deletions

diff --git a/.github/workflows/automation.yml b/.github/workflows/automation.yml
index a203e6695..2529d8099 100644
--- a/.github/workflows/automation.yml
+++ b/.github/workflows/automation.yml
@@ -2,8 +2,6 @@ name: Automation
 
 on:
   pull_request:
-  issues:
-  issue_comment:
 
 jobs:
   main:
diff --git a/Emby.Dlna/Configuration/DlnaOptions.cs b/Emby.Dlna/Configuration/DlnaOptions.cs
index e63a85860..5ceeb5530 100644
--- a/Emby.Dlna/Configuration/DlnaOptions.cs
+++ b/Emby.Dlna/Configuration/DlnaOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace Emby.Dlna.Configuration
diff --git a/Emby.Dlna/ConfigurationExtension.cs b/Emby.Dlna/ConfigurationExtension.cs
index fc02e1751..3ca43052a 100644
--- a/Emby.Dlna/ConfigurationExtension.cs
+++ b/Emby.Dlna/ConfigurationExtension.cs
@@ -1,4 +1,3 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using Emby.Dlna.Configuration;
diff --git a/Emby.Dlna/ContentDirectory/ContentDirectoryService.cs b/Emby.Dlna/ContentDirectory/ContentDirectoryService.cs
index 2f3107450..7b8c50440 100644
--- a/Emby.Dlna/ContentDirectory/ContentDirectoryService.cs
+++ b/Emby.Dlna/ContentDirectory/ContentDirectoryService.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/ContentDirectory/ControlHandler.cs b/Emby.Dlna/ContentDirectory/ControlHandler.cs
index 90ba601b4..27c5b2268 100644
--- a/Emby.Dlna/ContentDirectory/ControlHandler.cs
+++ b/Emby.Dlna/ContentDirectory/ControlHandler.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Globalization;
diff --git a/Emby.Dlna/ControlRequest.cs b/Emby.Dlna/ControlRequest.cs
index 4ea4e4e48..8ee6325e9 100644
--- a/Emby.Dlna/ControlRequest.cs
+++ b/Emby.Dlna/ControlRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.IO;
diff --git a/Emby.Dlna/ControlResponse.cs b/Emby.Dlna/ControlResponse.cs
index d827eef26..a7f2d4a73 100644
--- a/Emby.Dlna/ControlResponse.cs
+++ b/Emby.Dlna/ControlResponse.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/Emby.Dlna/Didl/DidlBuilder.cs b/Emby.Dlna/Didl/DidlBuilder.cs
index c66bdbf22..2982ce97e 100644
--- a/Emby.Dlna/Didl/DidlBuilder.cs
+++ b/Emby.Dlna/Didl/DidlBuilder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Didl/StringWriterWithEncoding.cs b/Emby.Dlna/Didl/StringWriterWithEncoding.cs
index 2b86ea333..b66f53ece 100644
--- a/Emby.Dlna/Didl/StringWriterWithEncoding.cs
+++ b/Emby.Dlna/Didl/StringWriterWithEncoding.cs
@@ -9,7 +9,7 @@ namespace Emby.Dlna.Didl
 {
     public class StringWriterWithEncoding : StringWriter
     {
-        private readonly Encoding _encoding;
+        private readonly Encoding? _encoding;
 
         public StringWriterWithEncoding()
         {
diff --git a/Emby.Dlna/DlnaConfigurationFactory.cs b/Emby.Dlna/DlnaConfigurationFactory.cs
index 4c6ca869a..6cc6b73a0 100644
--- a/Emby.Dlna/DlnaConfigurationFactory.cs
+++ b/Emby.Dlna/DlnaConfigurationFactory.cs
@@ -1,4 +1,3 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/Emby.Dlna/DlnaManager.cs b/Emby.Dlna/DlnaManager.cs
index 5f2be07cf..a1b106704 100644
--- a/Emby.Dlna/DlnaManager.cs
+++ b/Emby.Dlna/DlnaManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Emby.Dlna.csproj b/Emby.Dlna/Emby.Dlna.csproj
index 480621dd7..a40578e40 100644
--- a/Emby.Dlna/Emby.Dlna.csproj
+++ b/Emby.Dlna/Emby.Dlna.csproj
@@ -21,6 +21,7 @@
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <!-- Code Analyzers-->
diff --git a/Emby.Dlna/EventSubscriptionResponse.cs b/Emby.Dlna/EventSubscriptionResponse.cs
index 1b1bd426c..8c82dcbf6 100644
--- a/Emby.Dlna/EventSubscriptionResponse.cs
+++ b/Emby.Dlna/EventSubscriptionResponse.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/Emby.Dlna/Eventing/DlnaEventManager.cs b/Emby.Dlna/Eventing/DlnaEventManager.cs
index ff81e83b5..2e672b886 100644
--- a/Emby.Dlna/Eventing/DlnaEventManager.cs
+++ b/Emby.Dlna/Eventing/DlnaEventManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Eventing/EventSubscription.cs b/Emby.Dlna/Eventing/EventSubscription.cs
index 40d73ee0e..4fd7f8169 100644
--- a/Emby.Dlna/Eventing/EventSubscription.cs
+++ b/Emby.Dlna/Eventing/EventSubscription.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Main/DlnaEntryPoint.cs b/Emby.Dlna/Main/DlnaEntryPoint.cs
index bdfe430cf..0309926ab 100644
--- a/Emby.Dlna/Main/DlnaEntryPoint.cs
+++ b/Emby.Dlna/Main/DlnaEntryPoint.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/Device.cs b/Emby.Dlna/PlayTo/Device.cs
index abd99bbc3..5fa1fd589 100644
--- a/Emby.Dlna/PlayTo/Device.cs
+++ b/Emby.Dlna/PlayTo/Device.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/DeviceInfo.cs b/Emby.Dlna/PlayTo/DeviceInfo.cs
index d3daab9e0..2acfff4eb 100644
--- a/Emby.Dlna/PlayTo/DeviceInfo.cs
+++ b/Emby.Dlna/PlayTo/DeviceInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/Emby.Dlna/PlayTo/MediaChangedEventArgs.cs b/Emby.Dlna/PlayTo/MediaChangedEventArgs.cs
index dabd079af..2bc4d8cc2 100644
--- a/Emby.Dlna/PlayTo/MediaChangedEventArgs.cs
+++ b/Emby.Dlna/PlayTo/MediaChangedEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlayToController.cs b/Emby.Dlna/PlayTo/PlayToController.cs
index ee09cc65a..1e6a5fadb 100644
--- a/Emby.Dlna/PlayTo/PlayToController.cs
+++ b/Emby.Dlna/PlayTo/PlayToController.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlayToManager.cs b/Emby.Dlna/PlayTo/PlayToManager.cs
index f2f526221..35bf5927c 100644
--- a/Emby.Dlna/PlayTo/PlayToManager.cs
+++ b/Emby.Dlna/PlayTo/PlayToManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlaybackProgressEventArgs.cs b/Emby.Dlna/PlayTo/PlaybackProgressEventArgs.cs
index d14617c8a..c7d2b28df 100644
--- a/Emby.Dlna/PlayTo/PlaybackProgressEventArgs.cs
+++ b/Emby.Dlna/PlayTo/PlaybackProgressEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlaybackStartEventArgs.cs b/Emby.Dlna/PlayTo/PlaybackStartEventArgs.cs
index 3f8d55263..f8a14f411 100644
--- a/Emby.Dlna/PlayTo/PlaybackStartEventArgs.cs
+++ b/Emby.Dlna/PlayTo/PlaybackStartEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlaybackStoppedEventArgs.cs b/Emby.Dlna/PlayTo/PlaybackStoppedEventArgs.cs
index deeb47918..6661f92ac 100644
--- a/Emby.Dlna/PlayTo/PlaybackStoppedEventArgs.cs
+++ b/Emby.Dlna/PlayTo/PlaybackStoppedEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/PlaylistItem.cs b/Emby.Dlna/PlayTo/PlaylistItem.cs
index 85846166c..5056e69ae 100644
--- a/Emby.Dlna/PlayTo/PlaylistItem.cs
+++ b/Emby.Dlna/PlayTo/PlaylistItem.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.Dlna;
diff --git a/Emby.Dlna/PlayTo/PlaylistItemFactory.cs b/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
index e28840a89..657491303 100644
--- a/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
+++ b/Emby.Dlna/PlayTo/PlaylistItemFactory.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.IO;
diff --git a/Emby.Dlna/PlayTo/SsdpHttpClient.cs b/Emby.Dlna/PlayTo/SsdpHttpClient.cs
index d9f1ce490..f14f73bb6 100644
--- a/Emby.Dlna/PlayTo/SsdpHttpClient.cs
+++ b/Emby.Dlna/PlayTo/SsdpHttpClient.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/PlayTo/TransportCommands.cs b/Emby.Dlna/PlayTo/TransportCommands.cs
index cbcf66e45..b58669355 100644
--- a/Emby.Dlna/PlayTo/TransportCommands.cs
+++ b/Emby.Dlna/PlayTo/TransportCommands.cs
@@ -46,7 +46,7 @@ namespace Emby.Dlna.PlayTo
         {
             var serviceAction = new ServiceAction
             {
-                Name = container.GetValue(UPnpNamespaces.Svc + "name"),
+                Name = container.GetValue(UPnpNamespaces.Svc + "name") ?? string.Empty,
             };
 
             var argumentList = serviceAction.ArgumentList;
@@ -68,9 +68,9 @@ namespace Emby.Dlna.PlayTo
 
             return new Argument
             {
-                Name = container.GetValue(UPnpNamespaces.Svc + "name"),
-                Direction = container.GetValue(UPnpNamespaces.Svc + "direction"),
-                RelatedStateVariable = container.GetValue(UPnpNamespaces.Svc + "relatedStateVariable")
+                Name = container.GetValue(UPnpNamespaces.Svc + "name") ?? string.Empty,
+                Direction = container.GetValue(UPnpNamespaces.Svc + "direction") ?? string.Empty,
+                RelatedStateVariable = container.GetValue(UPnpNamespaces.Svc + "relatedStateVariable") ?? string.Empty
             };
         }
 
@@ -89,8 +89,8 @@ namespace Emby.Dlna.PlayTo
 
             return new StateVariable
             {
-                Name = container.GetValue(UPnpNamespaces.Svc + "name"),
-                DataType = container.GetValue(UPnpNamespaces.Svc + "dataType"),
+                Name = container.GetValue(UPnpNamespaces.Svc + "name") ?? string.Empty,
+                DataType = container.GetValue(UPnpNamespaces.Svc + "dataType") ?? string.Empty,
                 AllowedValues = allowedValues
             };
         }
@@ -166,7 +166,7 @@ namespace Emby.Dlna.PlayTo
             return string.Format(CultureInfo.InvariantCulture, CommandBase, action.Name, xmlNamesapce, stateString);
         }
 
-        private string BuildArgumentXml(Argument argument, string value, string commandParameter = "")
+        private string BuildArgumentXml(Argument argument, string? value, string commandParameter = "")
         {
             var state = StateVariables.FirstOrDefault(a => string.Equals(a.Name, argument.RelatedStateVariable, StringComparison.OrdinalIgnoreCase));
 
diff --git a/Emby.Dlna/PlayTo/uBaseObject.cs b/Emby.Dlna/PlayTo/uBaseObject.cs
index 0d9478e42..02d2da58d 100644
--- a/Emby.Dlna/PlayTo/uBaseObject.cs
+++ b/Emby.Dlna/PlayTo/uBaseObject.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Server/DescriptionXmlBuilder.cs b/Emby.Dlna/Server/DescriptionXmlBuilder.cs
index 09525aae4..3f3dfccd3 100644
--- a/Emby.Dlna/Server/DescriptionXmlBuilder.cs
+++ b/Emby.Dlna/Server/DescriptionXmlBuilder.cs
@@ -250,7 +250,8 @@ namespace Emby.Dlna.Server
 
             url = _serverAddress.TrimEnd('/') + "/dlna/" + _serverUdn + "/" + url.TrimStart('/');
 
-            return SecurityElement.Escape(url);
+            // TODO: @bond remove null-coalescing operator when https://github.com/dotnet/runtime/pull/52442 is merged/released
+            return SecurityElement.Escape(url) ?? string.Empty;
         }
 
         private IEnumerable<DeviceIcon> GetIcons()
diff --git a/Emby.Dlna/Service/BaseControlHandler.cs b/Emby.Dlna/Service/BaseControlHandler.cs
index e4b9877e1..904c23d99 100644
--- a/Emby.Dlna/Service/BaseControlHandler.cs
+++ b/Emby.Dlna/Service/BaseControlHandler.cs
@@ -47,7 +47,7 @@ namespace Emby.Dlna.Service
 
         private async Task<ControlResponse> ProcessControlRequestInternalAsync(ControlRequest request)
         {
-            ControlRequestInfo requestInfo;
+            ControlRequestInfo? requestInfo = null;
 
             using (var streamReader = new StreamReader(request.InputXml, Encoding.UTF8))
             {
@@ -151,7 +151,7 @@ namespace Emby.Dlna.Service
 
         private async Task<ControlRequestInfo> ParseBodyTagAsync(XmlReader reader)
         {
-            string namespaceURI = null, localName = null;
+            string? namespaceURI = null, localName = null;
 
             await reader.MoveToContentAsync().ConfigureAwait(false);
             await reader.ReadAsync().ConfigureAwait(false);
diff --git a/Emby.Dlna/Ssdp/DeviceDiscovery.cs b/Emby.Dlna/Ssdp/DeviceDiscovery.cs
index d9c6a93c7..391dda147 100644
--- a/Emby.Dlna/Ssdp/DeviceDiscovery.cs
+++ b/Emby.Dlna/Ssdp/DeviceDiscovery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/Emby.Dlna/Ssdp/SsdpExtensions.cs b/Emby.Dlna/Ssdp/SsdpExtensions.cs
index e7a52f168..d00eb02b4 100644
--- a/Emby.Dlna/Ssdp/SsdpExtensions.cs
+++ b/Emby.Dlna/Ssdp/SsdpExtensions.cs
@@ -7,21 +7,21 @@ namespace Emby.Dlna.Ssdp
 {
     public static class SsdpExtensions
     {
-        public static string GetValue(this XElement container, XName name)
+        public static string? GetValue(this XElement container, XName name)
         {
             var node = container.Element(name);
 
             return node?.Value;
         }
 
-        public static string GetAttributeValue(this XElement container, XName name)
+        public static string? GetAttributeValue(this XElement container, XName name)
         {
             var node = container.Attribute(name);
 
             return node?.Value;
         }
 
-        public static string GetDescendantValue(this XElement container, XName name)
+        public static string? GetDescendantValue(this XElement container, XName name)
             => container.Descendants(name).FirstOrDefault()?.Value;
     }
 }
diff --git a/Emby.Server.Implementations/Library/ResolverHelper.cs b/Emby.Server.Implementations/Library/ResolverHelper.cs
index b1a2e9284..1d9b44874 100644
--- a/Emby.Server.Implementations/Library/ResolverHelper.cs
+++ b/Emby.Server.Implementations/Library/ResolverHelper.cs
@@ -44,6 +44,11 @@ namespace Emby.Server.Implementations.Library
 
             // Make sure DateCreated and DateModified have values
             var fileInfo = directoryService.GetFile(item.Path);
+            if (fileInfo == null)
+            {
+                throw new FileNotFoundException("Can't find item path.", item.Path);
+            }
+
             SetDateCreated(item, fileInfo);
 
             EnsureName(item, fileInfo);
diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
index 44a8cdee4..9372b0f6c 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EncodedRecorder.cs
@@ -10,6 +10,7 @@ using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Json;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
@@ -307,13 +308,11 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             {
                 using (var reader = new StreamReader(source))
                 {
-                    while (!reader.EndOfStream)
+                    await foreach (var line in reader.ReadAllLinesAsync().ConfigureAwait(false))
                     {
-                        var line = await reader.ReadLineAsync().ConfigureAwait(false);
-
                         var bytes = Encoding.UTF8.GetBytes(Environment.NewLine + line);
 
-                        await target.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
+                        await target.WriteAsync(bytes.AsMemory()).ConfigureAwait(false);
                         await target.FlushAsync().ConfigureAwait(false);
                     }
                 }
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
index 4aa5832b1..324109bcf 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunHost.cs
@@ -182,16 +182,16 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
             await using var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
             using var sr = new StreamReader(stream, System.Text.Encoding.UTF8);
             var tuners = new List<LiveTvTunerInfo>();
-            while (!sr.EndOfStream)
+            await foreach (var line in sr.ReadAllLinesAsync().ConfigureAwait(false))
             {
-                string line = StripXML(sr.ReadLine());
-                if (line.Contains("Channel", StringComparison.Ordinal))
+                string stripedLine = StripXML(line);
+                if (stripedLine.Contains("Channel", StringComparison.Ordinal))
                 {
                     LiveTvTunerStatus status;
-                    var index = line.IndexOf("Channel", StringComparison.OrdinalIgnoreCase);
-                    var name = line.Substring(0, index - 1);
-                    var currentChannel = line.Substring(index + 7);
-                    if (currentChannel != "none")
+                    var index = stripedLine.IndexOf("Channel", StringComparison.OrdinalIgnoreCase);
+                    var name = stripedLine.Substring(0, index - 1);
+                    var currentChannel = stripedLine.Substring(index + 7);
+                    if (string.Equals(currentChannel, "none", StringComparison.Ordinal))
                     {
                         status = LiveTvTunerStatus.LiveTv;
                     }
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
index cc30a516d..84d416149 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3uParser.cs
@@ -35,16 +35,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             // Read the file and display it line by line.
             using (var reader = new StreamReader(await GetListingsStream(info, cancellationToken).ConfigureAwait(false)))
             {
-                return GetChannels(reader, channelIdPrefix, info.Id);
-            }
-        }
-
-        public List<ChannelInfo> ParseString(string text, string channelIdPrefix, string tunerHostId)
-        {
-            // Read the file and display it line by line.
-            using (var reader = new StringReader(text))
-            {
-                return GetChannels(reader, channelIdPrefix, tunerHostId);
+                return await GetChannelsAsync(reader, channelIdPrefix, info.Id).ConfigureAwait(false);
             }
         }
 
@@ -70,43 +61,42 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
 
         private const string ExtInfPrefix = "#EXTINF:";
 
-        private List<ChannelInfo> GetChannels(TextReader reader, string channelIdPrefix, string tunerHostId)
+        private async Task<List<ChannelInfo>> GetChannelsAsync(TextReader reader, string channelIdPrefix, string tunerHostId)
         {
             var channels = new List<ChannelInfo>();
-            string line;
             string extInf = string.Empty;
 
-            while ((line = reader.ReadLine()) != null)
+            await foreach (var line in reader.ReadAllLinesAsync().ConfigureAwait(false))
             {
-                line = line.Trim();
-                if (string.IsNullOrWhiteSpace(line))
+                var trimmedLine = line.Trim();
+                if (string.IsNullOrWhiteSpace(trimmedLine))
                 {
                     continue;
                 }
 
-                if (line.StartsWith("#EXTM3U", StringComparison.OrdinalIgnoreCase))
+                if (trimmedLine.StartsWith("#EXTM3U", StringComparison.OrdinalIgnoreCase))
                 {
                     continue;
                 }
 
-                if (line.StartsWith(ExtInfPrefix, StringComparison.OrdinalIgnoreCase))
+                if (trimmedLine.StartsWith(ExtInfPrefix, StringComparison.OrdinalIgnoreCase))
                 {
-                    extInf = line.Substring(ExtInfPrefix.Length).Trim();
+                    extInf = trimmedLine.Substring(ExtInfPrefix.Length).Trim();
                     _logger.LogInformation("Found m3u channel: {0}", extInf);
                 }
-                else if (!string.IsNullOrWhiteSpace(extInf) && !line.StartsWith('#'))
+                else if (!string.IsNullOrWhiteSpace(extInf) && !trimmedLine.StartsWith('#'))
                 {
-                    var channel = GetChannelnfo(extInf, tunerHostId, line);
+                    var channel = GetChannelnfo(extInf, tunerHostId, trimmedLine);
                     if (string.IsNullOrWhiteSpace(channel.Id))
                     {
-                        channel.Id = channelIdPrefix + line.GetMD5().ToString("N", CultureInfo.InvariantCulture);
+                        channel.Id = channelIdPrefix + trimmedLine.GetMD5().ToString("N", CultureInfo.InvariantCulture);
                     }
                     else
                     {
                         channel.Id = channelIdPrefix + channel.Id.GetMD5().ToString("N", CultureInfo.InvariantCulture);
                     }
 
-                    channel.Path = line;
+                    channel.Path = trimmedLine;
                     channels.Add(channel);
                     extInf = string.Empty;
                 }
diff --git a/Emby.Server.Implementations/Localization/LocalizationManager.cs b/Emby.Server.Implementations/Localization/LocalizationManager.cs
index 46858b4fb..220e423bf 100644
--- a/Emby.Server.Implementations/Localization/LocalizationManager.cs
+++ b/Emby.Server.Implementations/Localization/LocalizationManager.cs
@@ -7,6 +7,7 @@ using System.Linq;
 using System.Reflection;
 using System.Text.Json;
 using System.Threading.Tasks;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Json;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Model.Entities;
@@ -72,8 +73,7 @@ namespace Emby.Server.Implementations.Localization
                 using (var str = _assembly.GetManifestResourceStream(resource))
                 using (var reader = new StreamReader(str))
                 {
-                    string line;
-                    while ((line = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
+                    await foreach (var line in reader.ReadAllLinesAsync().ConfigureAwait(false))
                     {
                         if (string.IsNullOrWhiteSpace(line))
                         {
@@ -118,10 +118,8 @@ namespace Emby.Server.Implementations.Localization
             using (var stream = _assembly.GetManifestResourceStream(ResourcePath))
             using (var reader = new StreamReader(stream))
             {
-                while (!reader.EndOfStream)
+                await foreach (var line in reader.ReadAllLinesAsync().ConfigureAwait(false))
                 {
-                    var line = await reader.ReadLineAsync().ConfigureAwait(false);
-
                     if (string.IsNullOrWhiteSpace(line))
                     {
                         continue;
@@ -179,7 +177,7 @@ namespace Emby.Server.Implementations.Localization
         /// <inheritdoc />
         public IEnumerable<CountryInfo> GetCountries()
         {
-            StreamReader reader = new StreamReader(_assembly.GetManifestResourceStream("Emby.Server.Implementations.Localization.countries.json"));
+            using StreamReader reader = new StreamReader(_assembly.GetManifestResourceStream("Emby.Server.Implementations.Localization.countries.json"));
 
             return JsonSerializer.Deserialize<IEnumerable<CountryInfo>>(reader.ReadToEnd(), _jsonOptions);
         }
diff --git a/Jellyfin.Api/Auth/BaseAuthorizationHandler.cs b/Jellyfin.Api/Auth/BaseAuthorizationHandler.cs
index 7d68aecf9..392498c53 100644
--- a/Jellyfin.Api/Auth/BaseAuthorizationHandler.cs
+++ b/Jellyfin.Api/Auth/BaseAuthorizationHandler.cs
@@ -77,8 +77,9 @@ namespace Jellyfin.Api.Auth
                 return false;
             }
 
-            var ip = _httpContextAccessor.HttpContext.GetNormalizedRemoteIp();
-            var isInLocalNetwork = _networkManager.IsInLocalNetwork(ip);
+            var isInLocalNetwork = _httpContextAccessor.HttpContext != null
+                && _networkManager.IsInLocalNetwork(_httpContextAccessor.HttpContext.GetNormalizedRemoteIp());
+
             // User cannot access remotely and user is remote
             if (!user.HasPermission(PermissionKind.EnableRemoteAccess) && !isInLocalNetwork)
             {
diff --git a/Jellyfin.Api/Controllers/ConfigurationController.cs b/Jellyfin.Api/Controllers/ConfigurationController.cs
index 049a4bed7..b6309baab 100644
--- a/Jellyfin.Api/Controllers/ConfigurationController.cs
+++ b/Jellyfin.Api/Controllers/ConfigurationController.cs
@@ -1,3 +1,4 @@
+using System;
 using System.ComponentModel.DataAnnotations;
 using System.Net.Mime;
 using System.Text.Json;
@@ -94,6 +95,11 @@ namespace Jellyfin.Api.Controllers
         {
             var configurationType = _configurationManager.GetConfigurationType(key);
             var configuration = await JsonSerializer.DeserializeAsync(Request.Body, configurationType, _serializerOptions).ConfigureAwait(false);
+            if (configuration == null)
+            {
+                throw new ArgumentException("Body doesn't contain a valid configuration");
+            }
+
             _configurationManager.SaveConfiguration(key, configuration);
             return NoContent();
         }
diff --git a/Jellyfin.Api/Controllers/LibraryController.cs b/Jellyfin.Api/Controllers/LibraryController.cs
index 83a4b7525..ab6b0312d 100644
--- a/Jellyfin.Api/Controllers/LibraryController.cs
+++ b/Jellyfin.Api/Controllers/LibraryController.cs
@@ -600,7 +600,7 @@ namespace Jellyfin.Api.Controllers
         {
             foreach (var item in dto.Updates)
             {
-                _libraryMonitor.ReportFileSystemChanged(item.Path);
+                _libraryMonitor.ReportFileSystemChanged(item.Path ?? throw new ArgumentException("Item path can't be null."));
             }
 
             return NoContent();
diff --git a/Jellyfin.Api/Helpers/HlsHelpers.cs b/Jellyfin.Api/Helpers/HlsHelpers.cs
index 18e23fb5c..d0666034e 100644
--- a/Jellyfin.Api/Helpers/HlsHelpers.cs
+++ b/Jellyfin.Api/Helpers/HlsHelpers.cs
@@ -118,10 +118,7 @@ namespace Jellyfin.Api.Helpers
         /// <returns>The playlist text as a string.</returns>
         public static string GetLivePlaylistText(string path, StreamState state)
         {
-            using var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
-            using var reader = new StreamReader(stream);
-
-            var text = reader.ReadToEnd();
+            var text = File.ReadAllText(path);
 
             var segmentFormat = EncodingHelper.GetSegmentFileExtension(state.Request.SegmentContainer).TrimStart('.');
             if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase))
diff --git a/MediaBrowser.Common/Configuration/ConfigurationStore.cs b/MediaBrowser.Common/Configuration/ConfigurationStore.cs
index d31d45e4c..050ab1ab5 100644
--- a/MediaBrowser.Common/Configuration/ConfigurationStore.cs
+++ b/MediaBrowser.Common/Configuration/ConfigurationStore.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 
 namespace MediaBrowser.Common.Configuration
diff --git a/MediaBrowser.Common/Configuration/ConfigurationUpdateEventArgs.cs b/MediaBrowser.Common/Configuration/ConfigurationUpdateEventArgs.cs
index 344aecf53..2df87d879 100644
--- a/MediaBrowser.Common/Configuration/ConfigurationUpdateEventArgs.cs
+++ b/MediaBrowser.Common/Configuration/ConfigurationUpdateEventArgs.cs
@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Common/Configuration/IApplicationPaths.cs b/MediaBrowser.Common/Configuration/IApplicationPaths.cs
index 57c654667..1370e6d79 100644
--- a/MediaBrowser.Common/Configuration/IApplicationPaths.cs
+++ b/MediaBrowser.Common/Configuration/IApplicationPaths.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 namespace MediaBrowser.Common.Configuration
 {
     /// <summary>
diff --git a/MediaBrowser.Common/Cryptography/PasswordHash.cs b/MediaBrowser.Common/Cryptography/PasswordHash.cs
index ec21d0580..0e2065302 100644
--- a/MediaBrowser.Common/Cryptography/PasswordHash.cs
+++ b/MediaBrowser.Common/Cryptography/PasswordHash.cs
@@ -1,5 +1,4 @@
 #pragma warning disable CS1591
-#nullable enable
 
 using System;
 using System.Collections.Generic;
diff --git a/MediaBrowser.Common/Events/EventHelper.cs b/MediaBrowser.Common/Events/EventHelper.cs
index c9d3226ac..a9cf86fbc 100644
--- a/MediaBrowser.Common/Events/EventHelper.cs
+++ b/MediaBrowser.Common/Events/EventHelper.cs
@@ -17,7 +17,7 @@ namespace MediaBrowser.Common.Events
         /// <param name="sender">The sender.</param>
         /// <param name="args">The <see cref="EventArgs" /> instance containing the event data.</param>
         /// <param name="logger">The logger.</param>
-        public static void QueueEventIfNotNull(EventHandler handler, object sender, EventArgs args, ILogger logger)
+        public static void QueueEventIfNotNull(EventHandler? handler, object sender, EventArgs args, ILogger logger)
         {
             if (handler != null)
             {
@@ -43,7 +43,7 @@ namespace MediaBrowser.Common.Events
         /// <param name="sender">The sender.</param>
         /// <param name="args">The args.</param>
         /// <param name="logger">The logger.</param>
-        public static void QueueEventIfNotNull<T>(EventHandler<T> handler, object sender, T args, ILogger logger)
+        public static void QueueEventIfNotNull<T>(EventHandler<T>? handler, object sender, T args, ILogger logger)
         {
             if (handler != null)
             {
diff --git a/MediaBrowser.Common/Extensions/BaseExtensions.cs b/MediaBrowser.Common/Extensions/BaseExtensions.cs
index 40020093b..08964420e 100644
--- a/MediaBrowser.Common/Extensions/BaseExtensions.cs
+++ b/MediaBrowser.Common/Extensions/BaseExtensions.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Security.Cryptography;
 using System.Text;
diff --git a/MediaBrowser.Common/Extensions/CopyToExtensions.cs b/MediaBrowser.Common/Extensions/CopyToExtensions.cs
index 94bf7c740..2ecbc6539 100644
--- a/MediaBrowser.Common/Extensions/CopyToExtensions.cs
+++ b/MediaBrowser.Common/Extensions/CopyToExtensions.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System.Collections.Generic;
 
 namespace MediaBrowser.Common.Extensions
diff --git a/MediaBrowser.Common/Extensions/HttpContextExtensions.cs b/MediaBrowser.Common/Extensions/HttpContextExtensions.cs
index e51ad42d1..1e5877c84 100644
--- a/MediaBrowser.Common/Extensions/HttpContextExtensions.cs
+++ b/MediaBrowser.Common/Extensions/HttpContextExtensions.cs
@@ -17,7 +17,7 @@ namespace MediaBrowser.Common.Extensions
         {
             return (context.Connection.LocalIpAddress == null
                     && context.Connection.RemoteIpAddress == null)
-                   || context.Connection.LocalIpAddress.Equals(context.Connection.RemoteIpAddress);
+                   || Equals(context.Connection.LocalIpAddress, context.Connection.RemoteIpAddress);
         }
 
         /// <summary>
diff --git a/MediaBrowser.Common/Extensions/MethodNotAllowedException.cs b/MediaBrowser.Common/Extensions/MethodNotAllowedException.cs
index 258bd6662..48e758ee4 100644
--- a/MediaBrowser.Common/Extensions/MethodNotAllowedException.cs
+++ b/MediaBrowser.Common/Extensions/MethodNotAllowedException.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 
 namespace MediaBrowser.Common.Extensions
diff --git a/MediaBrowser.Common/Extensions/ProcessExtensions.cs b/MediaBrowser.Common/Extensions/ProcessExtensions.cs
index 2f52ba196..c74787122 100644
--- a/MediaBrowser.Common/Extensions/ProcessExtensions.cs
+++ b/MediaBrowser.Common/Extensions/ProcessExtensions.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Diagnostics;
 using System.Threading;
diff --git a/MediaBrowser.Common/Extensions/RateLimitExceededException.cs b/MediaBrowser.Common/Extensions/RateLimitExceededException.cs
index 7c7bdaa92..95802a462 100644
--- a/MediaBrowser.Common/Extensions/RateLimitExceededException.cs
+++ b/MediaBrowser.Common/Extensions/RateLimitExceededException.cs
@@ -1,4 +1,3 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Common/Extensions/ResourceNotFoundException.cs b/MediaBrowser.Common/Extensions/ResourceNotFoundException.cs
index ebac9d8e6..22130c5a1 100644
--- a/MediaBrowser.Common/Extensions/ResourceNotFoundException.cs
+++ b/MediaBrowser.Common/Extensions/ResourceNotFoundException.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 
 namespace MediaBrowser.Common.Extensions
diff --git a/MediaBrowser.Common/Extensions/ShuffleExtensions.cs b/MediaBrowser.Common/Extensions/ShuffleExtensions.cs
index 6f0ea9bd5..2604abf85 100644
--- a/MediaBrowser.Common/Extensions/ShuffleExtensions.cs
+++ b/MediaBrowser.Common/Extensions/ShuffleExtensions.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 
diff --git a/MediaBrowser.Common/Extensions/SplitStringExtensions.cs b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs
index e78fa78d6..9c9108495 100644
--- a/MediaBrowser.Common/Extensions/SplitStringExtensions.cs
+++ b/MediaBrowser.Common/Extensions/SplitStringExtensions.cs
@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
  */
-#nullable enable
+
 #pragma warning disable CS1591
 #pragma warning disable CA1034
 using System;
diff --git a/MediaBrowser.Common/Extensions/StreamExtensions.cs b/MediaBrowser.Common/Extensions/StreamExtensions.cs
index cd77be7b2..5cbf57d98 100644
--- a/MediaBrowser.Common/Extensions/StreamExtensions.cs
+++ b/MediaBrowser.Common/Extensions/StreamExtensions.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -35,11 +33,11 @@ namespace MediaBrowser.Common.Extensions
         }
 
         /// <summary>
-        /// Reads all lines in the <see cref="StreamReader" />.
+        /// Reads all lines in the <see cref="TextReader" />.
         /// </summary>
-        /// <param name="reader">The <see cref="StreamReader" /> to read from.</param>
+        /// <param name="reader">The <see cref="TextReader" /> to read from.</param>
         /// <returns>All lines in the stream.</returns>
-        public static IEnumerable<string> ReadAllLines(this StreamReader reader)
+        public static IEnumerable<string> ReadAllLines(this TextReader reader)
         {
             string? line;
             while ((line = reader.ReadLine()) != null)
@@ -47,5 +45,19 @@ namespace MediaBrowser.Common.Extensions
                 yield return line;
             }
         }
+
+        /// <summary>
+        /// Reads all lines in the <see cref="TextReader" />.
+        /// </summary>
+        /// <param name="reader">The <see cref="TextReader" /> to read from.</param>
+        /// <returns>All lines in the stream.</returns>
+        public static async IAsyncEnumerable<string> ReadAllLinesAsync(this TextReader reader)
+        {
+            string? line;
+            while ((line = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
+            {
+                yield return line;
+            }
+        }
     }
 }
diff --git a/MediaBrowser.Common/IApplicationHost.cs b/MediaBrowser.Common/IApplicationHost.cs
index c3e4ed6db..46d93e494 100644
--- a/MediaBrowser.Common/IApplicationHost.cs
+++ b/MediaBrowser.Common/IApplicationHost.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Reflection;
diff --git a/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs
index 2ec702165..127a41a06 100644
--- a/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverter.cs
@@ -9,67 +9,16 @@ namespace MediaBrowser.Common.Json.Converters
     /// Convert comma delimited string to array of type.
     /// </summary>
     /// <typeparam name="T">Type to convert to.</typeparam>
-    public class JsonCommaDelimitedArrayConverter<T> : JsonConverter<T[]>
+    public sealed class JsonCommaDelimitedArrayConverter<T> : JsonDelimitedArrayConverter<T>
     {
-        private readonly TypeConverter _typeConverter;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="JsonCommaDelimitedArrayConverter{T}"/> class.
         /// </summary>
-        public JsonCommaDelimitedArrayConverter()
+        public JsonCommaDelimitedArrayConverter() : base()
         {
-            _typeConverter = TypeDescriptor.GetConverter(typeof(T));
         }
 
         /// <inheritdoc />
-        public override T[] Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-        {
-            if (reader.TokenType == JsonTokenType.String)
-            {
-                var stringEntries = reader.GetString().Split(',', StringSplitOptions.RemoveEmptyEntries);
-                if (stringEntries.Length == 0)
-                {
-                    return Array.Empty<T>();
-                }
-
-                var parsedValues = new object[stringEntries.Length];
-                var convertedCount = 0;
-                for (var i = 0; i < stringEntries.Length; i++)
-                {
-                    try
-                    {
-                        parsedValues[i] = _typeConverter.ConvertFrom(stringEntries[i].Trim());
-                        convertedCount++;
-                    }
-                    catch (FormatException)
-                    {
-                        // TODO log when upgraded to .Net6
-                        // https://github.com/dotnet/runtime/issues/42975
-                        // _logger.LogDebug(e, "Error converting value.");
-                    }
-                }
-
-                var typedValues = new T[convertedCount];
-                var typedValueIndex = 0;
-                for (var i = 0; i < stringEntries.Length; i++)
-                {
-                    if (parsedValues[i] != null)
-                    {
-                        typedValues.SetValue(parsedValues[i], typedValueIndex);
-                        typedValueIndex++;
-                    }
-                }
-
-                return typedValues;
-            }
-
-            return JsonSerializer.Deserialize<T[]>(ref reader, options);
-        }
-
-        /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, T[] value, JsonSerializerOptions options)
-        {
-            throw new NotImplementedException();
-        }
+        protected override char Delimiter => ',';
     }
 }
diff --git a/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverterFactory.cs b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverterFactory.cs
index 24ed3ea19..de41348dd 100644
--- a/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverterFactory.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonCommaDelimitedArrayConverterFactory.cs
@@ -19,10 +19,10 @@ namespace MediaBrowser.Common.Json.Converters
         }
 
         /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
             var structType = typeToConvert.GetElementType() ?? typeToConvert.GenericTypeArguments[0];
-            return (JsonConverter)Activator.CreateInstance(typeof(JsonCommaDelimitedArrayConverter<>).MakeGenericType(structType));
+            return (JsonConverter?)Activator.CreateInstance(typeof(JsonCommaDelimitedArrayConverter<>).MakeGenericType(structType));
         }
     }
 }
diff --git a/MediaBrowser.Common/Json/Converters/JsonDelimitedArrayConverter.cs b/MediaBrowser.Common/Json/Converters/JsonDelimitedArrayConverter.cs
new file mode 100644
index 000000000..b691798c9
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonDelimitedArrayConverter.cs
@@ -0,0 +1,81 @@
+using System;
+using System.ComponentModel;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Convert delimited string to array of type.
+    /// </summary>
+    /// <typeparam name="T">Type to convert to.</typeparam>
+    public abstract class JsonDelimitedArrayConverter<T> : JsonConverter<T[]?>
+    {
+        private readonly TypeConverter _typeConverter;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="JsonDelimitedArrayConverter{T}"/> class.
+        /// </summary>
+        protected JsonDelimitedArrayConverter()
+        {
+            _typeConverter = TypeDescriptor.GetConverter(typeof(T));
+        }
+
+        /// <summary>
+        /// Gets the array delimiter.
+        /// </summary>
+        protected virtual char Delimiter { get; }
+
+        /// <inheritdoc />
+        public override T[]? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                // GetString can't return null here because we already handled it above
+                var stringEntries = reader.GetString()?.Split(Delimiter, StringSplitOptions.RemoveEmptyEntries);
+                if (stringEntries == null || stringEntries.Length == 0)
+                {
+                    return Array.Empty<T>();
+                }
+
+                var parsedValues = new object[stringEntries.Length];
+                var convertedCount = 0;
+                for (var i = 0; i < stringEntries.Length; i++)
+                {
+                    try
+                    {
+                        parsedValues[i] = _typeConverter.ConvertFrom(stringEntries[i].Trim());
+                        convertedCount++;
+                    }
+                    catch (FormatException)
+                    {
+                        // TODO log when upgraded to .Net6
+                        // https://github.com/dotnet/runtime/issues/42975
+                        // _logger.LogDebug(e, "Error converting value.");
+                    }
+                }
+
+                var typedValues = new T[convertedCount];
+                var typedValueIndex = 0;
+                for (var i = 0; i < stringEntries.Length; i++)
+                {
+                    if (parsedValues[i] != null)
+                    {
+                        typedValues.SetValue(parsedValues[i], typedValueIndex);
+                        typedValueIndex++;
+                    }
+                }
+
+                return typedValues;
+            }
+
+            return JsonSerializer.Deserialize<T[]>(ref reader, options);
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, T[]? value, JsonSerializerOptions options)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
diff --git a/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs b/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs
index d5b54e3ca..e2a3d798a 100644
--- a/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonNullableStructConverterFactory.cs
@@ -18,10 +18,10 @@ namespace MediaBrowser.Common.Json.Converters
         }
 
         /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
             var structType = typeToConvert.GenericTypeArguments[0];
-            return (JsonConverter)Activator.CreateInstance(typeof(JsonNullableStructConverter<>).MakeGenericType(structType));
+            return (JsonConverter?)Activator.CreateInstance(typeof(JsonNullableStructConverter<>).MakeGenericType(structType));
         }
     }
-}
\ No newline at end of file
+}
diff --git a/MediaBrowser.Common/Json/Converters/JsonOmdbNotAvailableStringConverter.cs b/MediaBrowser.Common/Json/Converters/JsonOmdbNotAvailableStringConverter.cs
index 6a8790374..77cf46b70 100644
--- a/MediaBrowser.Common/Json/Converters/JsonOmdbNotAvailableStringConverter.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonOmdbNotAvailableStringConverter.cs
@@ -7,15 +7,21 @@ namespace MediaBrowser.Common.Json.Converters
     /// <summary>
     /// Converts a string <c>N/A</c> to <c>string.Empty</c>.
     /// </summary>
-    public class JsonOmdbNotAvailableStringConverter : JsonConverter<string>
+    public class JsonOmdbNotAvailableStringConverter : JsonConverter<string?>
     {
         /// <inheritdoc />
-        public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {
+            if (reader.TokenType == JsonTokenType.Null)
+            {
+                return null;
+            }
+
             if (reader.TokenType == JsonTokenType.String)
             {
-                var str = reader.GetString();
-                if (str != null && str.Equals("N/A", StringComparison.OrdinalIgnoreCase))
+                // GetString can't return null here because we already handled it above
+                var str = reader.GetString()!;
+                if (str.Equals("N/A", StringComparison.OrdinalIgnoreCase))
                 {
                     return null;
                 }
@@ -23,11 +29,11 @@ namespace MediaBrowser.Common.Json.Converters
                 return str;
             }
 
-            return JsonSerializer.Deserialize<string>(ref reader, options);
+            return JsonSerializer.Deserialize<string?>(ref reader, options);
         }
 
         /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
+        public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)
         {
             writer.WriteStringValue(value);
         }
diff --git a/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverter.cs b/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverter.cs
index c408a3be1..a8f6cfbec 100644
--- a/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverter.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverter.cs
@@ -9,67 +9,16 @@ namespace MediaBrowser.Common.Json.Converters
     /// Convert Pipe delimited string to array of type.
     /// </summary>
     /// <typeparam name="T">Type to convert to.</typeparam>
-    public class JsonPipeDelimitedArrayConverter<T> : JsonConverter<T[]>
+    public sealed class JsonPipeDelimitedArrayConverter<T> : JsonDelimitedArrayConverter<T>
     {
-        private readonly TypeConverter _typeConverter;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="JsonPipeDelimitedArrayConverter{T}"/> class.
         /// </summary>
-        public JsonPipeDelimitedArrayConverter()
+        public JsonPipeDelimitedArrayConverter() : base()
         {
-            _typeConverter = TypeDescriptor.GetConverter(typeof(T));
         }
 
         /// <inheritdoc />
-        public override T[] Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-        {
-            if (reader.TokenType == JsonTokenType.String)
-            {
-                var stringEntries = reader.GetString()?.Split('|', StringSplitOptions.RemoveEmptyEntries);
-                if (stringEntries == null || stringEntries.Length == 0)
-                {
-                    return Array.Empty<T>();
-                }
-
-                var parsedValues = new object[stringEntries.Length];
-                var convertedCount = 0;
-                for (var i = 0; i < stringEntries.Length; i++)
-                {
-                    try
-                    {
-                        parsedValues[i] = _typeConverter.ConvertFrom(stringEntries[i].Trim());
-                        convertedCount++;
-                    }
-                    catch (FormatException)
-                    {
-                        // TODO log when upgraded to .Net6
-                        // https://github.com/dotnet/runtime/issues/42975
-                        // _logger.LogDebug(e, "Error converting value.");
-                    }
-                }
-
-                var typedValues = new T[convertedCount];
-                var typedValueIndex = 0;
-                for (var i = 0; i < stringEntries.Length; i++)
-                {
-                    if (parsedValues[i] != null)
-                    {
-                        typedValues.SetValue(parsedValues[i], typedValueIndex);
-                        typedValueIndex++;
-                    }
-                }
-
-                return typedValues;
-            }
-
-            return JsonSerializer.Deserialize<T[]>(ref reader, options);
-        }
-
-        /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, T[] value, JsonSerializerOptions options)
-        {
-            throw new NotImplementedException();
-        }
+        protected override char Delimiter => '|';
     }
 }
diff --git a/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverterFactory.cs b/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverterFactory.cs
index 5e77223ef..1bebc49ec 100644
--- a/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverterFactory.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonPipeDelimitedArrayConverterFactory.cs
@@ -19,10 +19,10 @@ namespace MediaBrowser.Common.Json.Converters
         }
 
         /// <inheritdoc />
-        public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
+        public override JsonConverter? CreateConverter(Type typeToConvert, JsonSerializerOptions options)
         {
             var structType = typeToConvert.GetElementType() ?? typeToConvert.GenericTypeArguments[0];
-            return (JsonConverter)Activator.CreateInstance(typeof(JsonPipeDelimitedArrayConverter<>).MakeGenericType(structType));
+            return (JsonConverter?)Activator.CreateInstance(typeof(JsonPipeDelimitedArrayConverter<>).MakeGenericType(structType));
         }
     }
 }
diff --git a/MediaBrowser.Common/Json/Converters/JsonStringConverter.cs b/MediaBrowser.Common/Json/Converters/JsonStringConverter.cs
index 669b3cd07..6cd980e48 100644
--- a/MediaBrowser.Common/Json/Converters/JsonStringConverter.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonStringConverter.cs
@@ -9,10 +9,10 @@ namespace MediaBrowser.Common.Json.Converters
     /// <summary>
     /// Converter to allow the serializer to read strings.
     /// </summary>
-    public class JsonStringConverter : JsonConverter<string>
+    public class JsonStringConverter : JsonConverter<string?>
     {
         /// <inheritdoc />
-        public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
         {
             return reader.TokenType switch
             {
@@ -23,7 +23,7 @@ namespace MediaBrowser.Common.Json.Converters
         }
 
         /// <inheritdoc />
-        public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
+        public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)
         {
             writer.WriteStringValue(value);
         }
@@ -36,4 +36,4 @@ namespace MediaBrowser.Common.Json.Converters
             return Encoding.UTF8.GetString(utf8Bytes);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/MediaBrowser.Common/Json/Converters/JsonVersionConverter.cs b/MediaBrowser.Common/Json/Converters/JsonVersionConverter.cs
index f69e868cc..81c093c54 100644
--- a/MediaBrowser.Common/Json/Converters/JsonVersionConverter.cs
+++ b/MediaBrowser.Common/Json/Converters/JsonVersionConverter.cs
@@ -14,7 +14,7 @@ namespace MediaBrowser.Common.Json.Converters
     {
         /// <inheritdoc />
         public override Version Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
-            => new Version(reader.GetString());
+            => new Version(reader.GetString()!); // Will throw ArgumentNullException on null
 
         /// <inheritdoc />
         public override void Write(Utf8JsonWriter writer, Version value, JsonSerializerOptions options)
diff --git a/MediaBrowser.Common/MediaBrowser.Common.csproj b/MediaBrowser.Common/MediaBrowser.Common.csproj
index 0d9f78704..0299a8456 100644
--- a/MediaBrowser.Common/MediaBrowser.Common.csproj
+++ b/MediaBrowser.Common/MediaBrowser.Common.csproj
@@ -33,6 +33,7 @@
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <Nullable>enable</Nullable>
     <AnalysisMode>AllEnabledByDefault</AnalysisMode>
     <CodeAnalysisRuleSet>../jellyfin.ruleset</CodeAnalysisRuleSet>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
diff --git a/MediaBrowser.Common/Net/INetworkManager.cs b/MediaBrowser.Common/Net/INetworkManager.cs
index 185df5b77..b93939730 100644
--- a/MediaBrowser.Common/Net/INetworkManager.cs
+++ b/MediaBrowser.Common/Net/INetworkManager.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
diff --git a/MediaBrowser.Common/Net/IPHost.cs b/MediaBrowser.Common/Net/IPHost.cs
index 7156ce618..5db8817ee 100644
--- a/MediaBrowser.Common/Net/IPHost.cs
+++ b/MediaBrowser.Common/Net/IPHost.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Diagnostics;
 using System.Linq;
diff --git a/MediaBrowser.Common/Net/IPNetAddress.cs b/MediaBrowser.Common/Net/IPNetAddress.cs
index 589aad4b0..f6e3971bf 100644
--- a/MediaBrowser.Common/Net/IPNetAddress.cs
+++ b/MediaBrowser.Common/Net/IPNetAddress.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Net;
 using System.Net.Sockets;
diff --git a/MediaBrowser.Common/Net/IPObject.cs b/MediaBrowser.Common/Net/IPObject.cs
index 3542dcd75..2612268fd 100644
--- a/MediaBrowser.Common/Net/IPObject.cs
+++ b/MediaBrowser.Common/Net/IPObject.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Net;
 using System.Net.Sockets;
diff --git a/MediaBrowser.Common/Plugins/BasePlugin.cs b/MediaBrowser.Common/Plugins/BasePlugin.cs
index ad5a7338d..8972089a8 100644
--- a/MediaBrowser.Common/Plugins/BasePlugin.cs
+++ b/MediaBrowser.Common/Plugins/BasePlugin.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.IO;
 using System.Reflection;
diff --git a/MediaBrowser.Common/Plugins/BasePluginOfT.cs b/MediaBrowser.Common/Plugins/BasePluginOfT.cs
index e074cc6a0..8a6d28e0f 100644
--- a/MediaBrowser.Common/Plugins/BasePluginOfT.cs
+++ b/MediaBrowser.Common/Plugins/BasePluginOfT.cs
@@ -1,4 +1,6 @@
+#nullable disable
 #pragma warning disable SA1649 // File name should match first type name
+
 using System;
 using System.IO;
 using System.Runtime.InteropServices;
diff --git a/MediaBrowser.Common/Plugins/IPlugin.cs b/MediaBrowser.Common/Plugins/IPlugin.cs
index b2ba1179c..01e0a536d 100644
--- a/MediaBrowser.Common/Plugins/IPlugin.cs
+++ b/MediaBrowser.Common/Plugins/IPlugin.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using MediaBrowser.Model.Plugins;
 
diff --git a/MediaBrowser.Common/Plugins/IPluginManager.cs b/MediaBrowser.Common/Plugins/IPluginManager.cs
index 0e2e814cb..176bcbbd5 100644
--- a/MediaBrowser.Common/Plugins/IPluginManager.cs
+++ b/MediaBrowser.Common/Plugins/IPluginManager.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 using System.Reflection;
diff --git a/MediaBrowser.Common/Plugins/LocalPlugin.cs b/MediaBrowser.Common/Plugins/LocalPlugin.cs
index 12a1ad1ec..4c8e2d504 100644
--- a/MediaBrowser.Common/Plugins/LocalPlugin.cs
+++ b/MediaBrowser.Common/Plugins/LocalPlugin.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System;
 using System.Collections.Generic;
 using MediaBrowser.Model.Plugins;
diff --git a/MediaBrowser.Common/Plugins/PluginManifest.cs b/MediaBrowser.Common/Plugins/PluginManifest.cs
index 4c724f694..2910dbe14 100644
--- a/MediaBrowser.Common/Plugins/PluginManifest.cs
+++ b/MediaBrowser.Common/Plugins/PluginManifest.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Text.Json.Serialization;
 using MediaBrowser.Model.Plugins;
diff --git a/MediaBrowser.Common/Progress/ActionableProgress.cs b/MediaBrowser.Common/Progress/ActionableProgress.cs
index fe7cb1078..0ba46ea3b 100644
--- a/MediaBrowser.Common/Progress/ActionableProgress.cs
+++ b/MediaBrowser.Common/Progress/ActionableProgress.cs
@@ -14,9 +14,9 @@ namespace MediaBrowser.Common.Progress
         /// <summary>
         /// The _actions.
         /// </summary>
-        private Action<T> _action;
+        private Action<T>? _action;
 
-        public event EventHandler<T> ProgressChanged;
+        public event EventHandler<T>? ProgressChanged;
 
         /// <summary>
         /// Registers the action.
diff --git a/MediaBrowser.Common/Progress/SimpleProgress.cs b/MediaBrowser.Common/Progress/SimpleProgress.cs
index 988d8ad34..7071f2bc3 100644
--- a/MediaBrowser.Common/Progress/SimpleProgress.cs
+++ b/MediaBrowser.Common/Progress/SimpleProgress.cs
@@ -7,7 +7,7 @@ namespace MediaBrowser.Common.Progress
 {
     public class SimpleProgress<T> : IProgress<T>
     {
-        public event EventHandler<T> ProgressChanged;
+        public event EventHandler<T>? ProgressChanged;
 
         public void Report(T value)
         {
diff --git a/MediaBrowser.Common/Providers/ProviderIdParsers.cs b/MediaBrowser.Common/Providers/ProviderIdParsers.cs
index 64c2e1976..33d09ed38 100644
--- a/MediaBrowser.Common/Providers/ProviderIdParsers.cs
+++ b/MediaBrowser.Common/Providers/ProviderIdParsers.cs
@@ -1,6 +1,4 @@
-#nullable enable
-
-using System;
+using System;
 using System.Diagnostics.CodeAnalysis;
 
 namespace MediaBrowser.Common.Providers
diff --git a/MediaBrowser.Common/Updates/IInstallationManager.cs b/MediaBrowser.Common/Updates/IInstallationManager.cs
index 0844c2d79..c2a28e0a2 100644
--- a/MediaBrowser.Common/Updates/IInstallationManager.cs
+++ b/MediaBrowser.Common/Updates/IInstallationManager.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Common/Updates/InstallationEventArgs.cs b/MediaBrowser.Common/Updates/InstallationEventArgs.cs
index adf336313..f4f759955 100644
--- a/MediaBrowser.Common/Updates/InstallationEventArgs.cs
+++ b/MediaBrowser.Common/Updates/InstallationEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using MediaBrowser.Model.Updates;
 
diff --git a/MediaBrowser.Common/Updates/InstallationFailedEventArgs.cs b/MediaBrowser.Common/Updates/InstallationFailedEventArgs.cs
index 46f10c84f..d37146195 100644
--- a/MediaBrowser.Common/Updates/InstallationFailedEventArgs.cs
+++ b/MediaBrowser.Common/Updates/InstallationFailedEventArgs.cs
@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Authentication/AuthenticationResult.cs b/MediaBrowser.Controller/Authentication/AuthenticationResult.cs
index 4249a9a66..635e4eb3d 100644
--- a/MediaBrowser.Controller/Authentication/AuthenticationResult.cs
+++ b/MediaBrowser.Controller/Authentication/AuthenticationResult.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/Authentication/IAuthenticationProvider.cs b/MediaBrowser.Controller/Authentication/IAuthenticationProvider.cs
index ecdffa2eb..a56d3c822 100644
--- a/MediaBrowser.Controller/Authentication/IAuthenticationProvider.cs
+++ b/MediaBrowser.Controller/Authentication/IAuthenticationProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Threading.Tasks;
diff --git a/MediaBrowser.Controller/Authentication/IPasswordResetProvider.cs b/MediaBrowser.Controller/Authentication/IPasswordResetProvider.cs
index 6729b9115..8c9d1baf8 100644
--- a/MediaBrowser.Controller/Authentication/IPasswordResetProvider.cs
+++ b/MediaBrowser.Controller/Authentication/IPasswordResetProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs b/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
index a233c358e..68119cfed 100644
--- a/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
+++ b/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Linq;
 using System.Threading;
diff --git a/MediaBrowser.Controller/BaseItemManager/IBaseItemManager.cs b/MediaBrowser.Controller/BaseItemManager/IBaseItemManager.cs
index 8a8736427..b2b36c040 100644
--- a/MediaBrowser.Controller/BaseItemManager/IBaseItemManager.cs
+++ b/MediaBrowser.Controller/BaseItemManager/IBaseItemManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Model.Configuration;
diff --git a/MediaBrowser.Controller/Channels/Channel.cs b/MediaBrowser.Controller/Channels/Channel.cs
index b2315bda4..26c64e0da 100644
--- a/MediaBrowser.Controller/Channels/Channel.cs
+++ b/MediaBrowser.Controller/Channels/Channel.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Channels/ChannelItemInfo.cs b/MediaBrowser.Controller/Channels/ChannelItemInfo.cs
index 476992cbd..fa7aff647 100644
--- a/MediaBrowser.Controller/Channels/ChannelItemInfo.cs
+++ b/MediaBrowser.Controller/Channels/ChannelItemInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Channels/ChannelItemResult.cs b/MediaBrowser.Controller/Channels/ChannelItemResult.cs
index cee7b2003..8e937852f 100644
--- a/MediaBrowser.Controller/Channels/ChannelItemResult.cs
+++ b/MediaBrowser.Controller/Channels/ChannelItemResult.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Channels/ChannelSearchInfo.cs b/MediaBrowser.Controller/Channels/ChannelSearchInfo.cs
index 32469d4d7..53a73d62a 100644
--- a/MediaBrowser.Controller/Channels/ChannelSearchInfo.cs
+++ b/MediaBrowser.Controller/Channels/ChannelSearchInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Channels
diff --git a/MediaBrowser.Controller/Channels/IChannel.cs b/MediaBrowser.Controller/Channels/IChannel.cs
index 2c0eadf95..01bf8d5c8 100644
--- a/MediaBrowser.Controller/Channels/IChannel.cs
+++ b/MediaBrowser.Controller/Channels/IChannel.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Channels/IChannelManager.cs b/MediaBrowser.Controller/Channels/IChannelManager.cs
index ddae7dbd3..4c5626338 100644
--- a/MediaBrowser.Controller/Channels/IChannelManager.cs
+++ b/MediaBrowser.Controller/Channels/IChannelManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Channels/IHasCacheKey.cs b/MediaBrowser.Controller/Channels/IHasCacheKey.cs
index bf895a0ec..9fae43033 100644
--- a/MediaBrowser.Controller/Channels/IHasCacheKey.cs
+++ b/MediaBrowser.Controller/Channels/IHasCacheKey.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Channels
diff --git a/MediaBrowser.Controller/Channels/ISearchableChannel.cs b/MediaBrowser.Controller/Channels/ISearchableChannel.cs
index b627ca1c2..b58446fc4 100644
--- a/MediaBrowser.Controller/Channels/ISearchableChannel.cs
+++ b/MediaBrowser.Controller/Channels/ISearchableChannel.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Channels/InternalChannelFeatures.cs b/MediaBrowser.Controller/Channels/InternalChannelFeatures.cs
index 137f5d095..152c653dc 100644
--- a/MediaBrowser.Controller/Channels/InternalChannelFeatures.cs
+++ b/MediaBrowser.Controller/Channels/InternalChannelFeatures.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Channels/InternalChannelItemQuery.cs b/MediaBrowser.Controller/Channels/InternalChannelItemQuery.cs
index 7e9bb28ed..0d837faca 100644
--- a/MediaBrowser.Controller/Channels/InternalChannelItemQuery.cs
+++ b/MediaBrowser.Controller/Channels/InternalChannelItemQuery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs b/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs
index f6037d05e..94e7541f8 100644
--- a/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs
+++ b/MediaBrowser.Controller/Collections/CollectionCreationOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Collections/CollectionEvents.cs b/MediaBrowser.Controller/Collections/CollectionEvents.cs
index ce59b4ada..821318ffc 100644
--- a/MediaBrowser.Controller/Collections/CollectionEvents.cs
+++ b/MediaBrowser.Controller/Collections/CollectionEvents.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Collections/ICollectionManager.cs b/MediaBrowser.Controller/Collections/ICollectionManager.cs
index a6991e2ea..46bc37e7f 100644
--- a/MediaBrowser.Controller/Collections/ICollectionManager.cs
+++ b/MediaBrowser.Controller/Collections/ICollectionManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Configuration/IServerConfigurationManager.cs b/MediaBrowser.Controller/Configuration/IServerConfigurationManager.cs
index 43ad04dba..44e2c45dd 100644
--- a/MediaBrowser.Controller/Configuration/IServerConfigurationManager.cs
+++ b/MediaBrowser.Controller/Configuration/IServerConfigurationManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Model.Configuration;
 
diff --git a/MediaBrowser.Controller/Devices/IDeviceManager.cs b/MediaBrowser.Controller/Devices/IDeviceManager.cs
index 8f0872dba..ef17c8fb3 100644
--- a/MediaBrowser.Controller/Devices/IDeviceManager.cs
+++ b/MediaBrowser.Controller/Devices/IDeviceManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Dlna/IDlnaManager.cs b/MediaBrowser.Controller/Dlna/IDlnaManager.cs
index dc2d5a356..b51dc255c 100644
--- a/MediaBrowser.Controller/Dlna/IDlnaManager.cs
+++ b/MediaBrowser.Controller/Dlna/IDlnaManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Drawing/IImageEncoder.cs b/MediaBrowser.Controller/Drawing/IImageEncoder.cs
index 770c6dc2d..800f7a8bb 100644
--- a/MediaBrowser.Controller/Drawing/IImageEncoder.cs
+++ b/MediaBrowser.Controller/Drawing/IImageEncoder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 #nullable enable
 
diff --git a/MediaBrowser.Controller/Drawing/IImageProcessor.cs b/MediaBrowser.Controller/Drawing/IImageProcessor.cs
index 142cebd0c..9bfead8b3 100644
--- a/MediaBrowser.Controller/Drawing/IImageProcessor.cs
+++ b/MediaBrowser.Controller/Drawing/IImageProcessor.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 #nullable enable
 
diff --git a/MediaBrowser.Controller/Drawing/ImageCollageOptions.cs b/MediaBrowser.Controller/Drawing/ImageCollageOptions.cs
index fe0465d0d..f06bbe4d0 100644
--- a/MediaBrowser.Controller/Drawing/ImageCollageOptions.cs
+++ b/MediaBrowser.Controller/Drawing/ImageCollageOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Drawing
diff --git a/MediaBrowser.Controller/Drawing/ImageHelper.cs b/MediaBrowser.Controller/Drawing/ImageHelper.cs
index 596fcbc8c..204175ed5 100644
--- a/MediaBrowser.Controller/Drawing/ImageHelper.cs
+++ b/MediaBrowser.Controller/Drawing/ImageHelper.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 #nullable enable
 
diff --git a/MediaBrowser.Controller/Drawing/ImageProcessingOptions.cs b/MediaBrowser.Controller/Drawing/ImageProcessingOptions.cs
index 230a0af60..11e663301 100644
--- a/MediaBrowser.Controller/Drawing/ImageProcessingOptions.cs
+++ b/MediaBrowser.Controller/Drawing/ImageProcessingOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Drawing/ImageProcessorExtensions.cs b/MediaBrowser.Controller/Drawing/ImageProcessorExtensions.cs
index d3a2b4dbf..b036425ab 100644
--- a/MediaBrowser.Controller/Drawing/ImageProcessorExtensions.cs
+++ b/MediaBrowser.Controller/Drawing/ImageProcessorExtensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Controller.Entities;
diff --git a/MediaBrowser.Controller/Drawing/ImageStream.cs b/MediaBrowser.Controller/Drawing/ImageStream.cs
index 46f58ec15..591cc53d1 100644
--- a/MediaBrowser.Controller/Drawing/ImageStream.cs
+++ b/MediaBrowser.Controller/Drawing/ImageStream.cs
@@ -12,7 +12,7 @@ namespace MediaBrowser.Controller.Drawing
         /// Gets or sets the stream.
         /// </summary>
         /// <value>The stream.</value>
-        public Stream Stream { get; set; }
+        public Stream? Stream { get; set; }
 
         /// <summary>
         /// Gets or sets the format.
diff --git a/MediaBrowser.Controller/Dto/DtoOptions.cs b/MediaBrowser.Controller/Dto/DtoOptions.cs
index 356783750..758e841a7 100644
--- a/MediaBrowser.Controller/Dto/DtoOptions.cs
+++ b/MediaBrowser.Controller/Dto/DtoOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Dto/IDtoService.cs b/MediaBrowser.Controller/Dto/IDtoService.cs
index 988557f42..7f4bbead0 100644
--- a/MediaBrowser.Controller/Dto/IDtoService.cs
+++ b/MediaBrowser.Controller/Dto/IDtoService.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Collections.Generic;
 using Jellyfin.Data.Entities;
 using MediaBrowser.Controller.Entities;
diff --git a/MediaBrowser.Controller/Entities/AggregateFolder.cs b/MediaBrowser.Controller/Entities/AggregateFolder.cs
index 6a92200dd..f1944a7d3 100644
--- a/MediaBrowser.Controller/Entities/AggregateFolder.cs
+++ b/MediaBrowser.Controller/Entities/AggregateFolder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Audio/Audio.cs b/MediaBrowser.Controller/Entities/Audio/Audio.cs
index 8220464b3..4c2b7cb7c 100644
--- a/MediaBrowser.Controller/Entities/Audio/Audio.cs
+++ b/MediaBrowser.Controller/Entities/Audio/Audio.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Audio/IHasAlbumArtist.cs b/MediaBrowser.Controller/Entities/Audio/IHasAlbumArtist.cs
index 20fad4cb0..1625c748a 100644
--- a/MediaBrowser.Controller/Entities/Audio/IHasAlbumArtist.cs
+++ b/MediaBrowser.Controller/Entities/Audio/IHasAlbumArtist.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Entities/Audio/IHasMusicGenres.cs b/MediaBrowser.Controller/Entities/Audio/IHasMusicGenres.cs
index ac4dd1688..db60c3071 100644
--- a/MediaBrowser.Controller/Entities/Audio/IHasMusicGenres.cs
+++ b/MediaBrowser.Controller/Entities/Audio/IHasMusicGenres.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Entities.Audio
diff --git a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
index 9a33ad9d7..610bce4f5 100644
--- a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
+++ b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Audio/MusicArtist.cs b/MediaBrowser.Controller/Entities/Audio/MusicArtist.cs
index 8a9bb12c7..6101d3016 100644
--- a/MediaBrowser.Controller/Entities/Audio/MusicArtist.cs
+++ b/MediaBrowser.Controller/Entities/Audio/MusicArtist.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Audio/MusicGenre.cs b/MediaBrowser.Controller/Entities/Audio/MusicGenre.cs
index f0c076108..b07d47ffd 100644
--- a/MediaBrowser.Controller/Entities/Audio/MusicGenre.cs
+++ b/MediaBrowser.Controller/Entities/Audio/MusicGenre.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/AudioBook.cs b/MediaBrowser.Controller/Entities/AudioBook.cs
index f4bd851e1..405284622 100644
--- a/MediaBrowser.Controller/Entities/AudioBook.cs
+++ b/MediaBrowser.Controller/Entities/AudioBook.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs
index 32ae15498..ca5213273 100644
--- a/MediaBrowser.Controller/Entities/BaseItem.cs
+++ b/MediaBrowser.Controller/Entities/BaseItem.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
index 157ed8332..c39b18891 100644
--- a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
+++ b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #nullable enable
 #pragma warning disable CS1591
 
diff --git a/MediaBrowser.Controller/Entities/BasePluginFolder.cs b/MediaBrowser.Controller/Entities/BasePluginFolder.cs
index ef5a5a734..1bd25042f 100644
--- a/MediaBrowser.Controller/Entities/BasePluginFolder.cs
+++ b/MediaBrowser.Controller/Entities/BasePluginFolder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Text.Json.Serialization;
diff --git a/MediaBrowser.Controller/Entities/Book.cs b/MediaBrowser.Controller/Entities/Book.cs
index 55945283c..3d0370248 100644
--- a/MediaBrowser.Controller/Entities/Book.cs
+++ b/MediaBrowser.Controller/Entities/Book.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/CollectionFolder.cs b/MediaBrowser.Controller/Entities/CollectionFolder.cs
index bc5f38256..a86da29ce 100644
--- a/MediaBrowser.Controller/Entities/CollectionFolder.cs
+++ b/MediaBrowser.Controller/Entities/CollectionFolder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Extensions.cs b/MediaBrowser.Controller/Entities/Extensions.cs
index 3a34c668c..244cc00be 100644
--- a/MediaBrowser.Controller/Entities/Extensions.cs
+++ b/MediaBrowser.Controller/Entities/Extensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Linq;
 using MediaBrowser.Common.Extensions;
diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index d74e6f9d8..a59f5c6e4 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Genre.cs b/MediaBrowser.Controller/Entities/Genre.cs
index 74a170204..7987f38a0 100644
--- a/MediaBrowser.Controller/Entities/Genre.cs
+++ b/MediaBrowser.Controller/Entities/Genre.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/ICollectionFolder.cs b/MediaBrowser.Controller/Entities/ICollectionFolder.cs
index b84a9fa6f..2304570fd 100644
--- a/MediaBrowser.Controller/Entities/ICollectionFolder.cs
+++ b/MediaBrowser.Controller/Entities/ICollectionFolder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/IHasAspectRatio.cs b/MediaBrowser.Controller/Entities/IHasAspectRatio.cs
index d7d007668..3aeb7468f 100644
--- a/MediaBrowser.Controller/Entities/IHasAspectRatio.cs
+++ b/MediaBrowser.Controller/Entities/IHasAspectRatio.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 namespace MediaBrowser.Controller.Entities
 {
     /// <summary>
diff --git a/MediaBrowser.Controller/Entities/IHasDisplayOrder.cs b/MediaBrowser.Controller/Entities/IHasDisplayOrder.cs
index 13226b234..14459624e 100644
--- a/MediaBrowser.Controller/Entities/IHasDisplayOrder.cs
+++ b/MediaBrowser.Controller/Entities/IHasDisplayOrder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 namespace MediaBrowser.Controller.Entities
 {
     /// <summary>
diff --git a/MediaBrowser.Controller/Entities/IHasMediaSources.cs b/MediaBrowser.Controller/Entities/IHasMediaSources.cs
index 0f612262a..98c3b3edf 100644
--- a/MediaBrowser.Controller/Entities/IHasMediaSources.cs
+++ b/MediaBrowser.Controller/Entities/IHasMediaSources.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/IHasProgramAttributes.cs b/MediaBrowser.Controller/Entities/IHasProgramAttributes.cs
index f747b5149..f80f7c304 100644
--- a/MediaBrowser.Controller/Entities/IHasProgramAttributes.cs
+++ b/MediaBrowser.Controller/Entities/IHasProgramAttributes.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.LiveTv;
diff --git a/MediaBrowser.Controller/Entities/IHasSeries.cs b/MediaBrowser.Controller/Entities/IHasSeries.cs
index 5444f1f52..64d769d5b 100644
--- a/MediaBrowser.Controller/Entities/IHasSeries.cs
+++ b/MediaBrowser.Controller/Entities/IHasSeries.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/IHasSpecialFeatures.cs b/MediaBrowser.Controller/Entities/IHasSpecialFeatures.cs
index 6a350212b..f317a02ff 100644
--- a/MediaBrowser.Controller/Entities/IHasSpecialFeatures.cs
+++ b/MediaBrowser.Controller/Entities/IHasSpecialFeatures.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/IHasTrailers.cs b/MediaBrowser.Controller/Entities/IHasTrailers.cs
index d1f6f2b7e..2bd9ded33 100644
--- a/MediaBrowser.Controller/Entities/IHasTrailers.cs
+++ b/MediaBrowser.Controller/Entities/IHasTrailers.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/InternalItemsQuery.cs b/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
index 270217356..c06021029 100644
--- a/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
+++ b/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/InternalPeopleQuery.cs b/MediaBrowser.Controller/Entities/InternalPeopleQuery.cs
index 5b96a5af6..b2d6a4609 100644
--- a/MediaBrowser.Controller/Entities/InternalPeopleQuery.cs
+++ b/MediaBrowser.Controller/Entities/InternalPeopleQuery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/ItemImageInfo.cs b/MediaBrowser.Controller/Entities/ItemImageInfo.cs
index 570d8eec0..ea8555dbf 100644
--- a/MediaBrowser.Controller/Entities/ItemImageInfo.cs
+++ b/MediaBrowser.Controller/Entities/ItemImageInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/LinkedChild.cs b/MediaBrowser.Controller/Entities/LinkedChild.cs
index 8e0f721e7..01c0a9339 100644
--- a/MediaBrowser.Controller/Entities/LinkedChild.cs
+++ b/MediaBrowser.Controller/Entities/LinkedChild.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Movies/BoxSet.cs b/MediaBrowser.Controller/Entities/Movies/BoxSet.cs
index 507f400f1..74e84288d 100644
--- a/MediaBrowser.Controller/Entities/Movies/BoxSet.cs
+++ b/MediaBrowser.Controller/Entities/Movies/BoxSet.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Movies/Movie.cs b/MediaBrowser.Controller/Entities/Movies/Movie.cs
index 8b67aaccc..64d60c2e9 100644
--- a/MediaBrowser.Controller/Entities/Movies/Movie.cs
+++ b/MediaBrowser.Controller/Entities/Movies/Movie.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/MusicVideo.cs b/MediaBrowser.Controller/Entities/MusicVideo.cs
index b278a0142..f42e7723c 100644
--- a/MediaBrowser.Controller/Entities/MusicVideo.cs
+++ b/MediaBrowser.Controller/Entities/MusicVideo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Person.cs b/MediaBrowser.Controller/Entities/Person.cs
index c4fcb0267..d9ff55362 100644
--- a/MediaBrowser.Controller/Entities/Person.cs
+++ b/MediaBrowser.Controller/Entities/Person.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/PersonInfo.cs b/MediaBrowser.Controller/Entities/PersonInfo.cs
index 4ff9b0955..fb79323f8 100644
--- a/MediaBrowser.Controller/Entities/PersonInfo.cs
+++ b/MediaBrowser.Controller/Entities/PersonInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Photo.cs b/MediaBrowser.Controller/Entities/Photo.cs
index 0f82f742f..3312a0e3e 100644
--- a/MediaBrowser.Controller/Entities/Photo.cs
+++ b/MediaBrowser.Controller/Entities/Photo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Text.Json.Serialization;
diff --git a/MediaBrowser.Controller/Entities/Share.cs b/MediaBrowser.Controller/Entities/Share.cs
index 50f1655f3..7e4ec1830 100644
--- a/MediaBrowser.Controller/Entities/Share.cs
+++ b/MediaBrowser.Controller/Entities/Share.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Entities
diff --git a/MediaBrowser.Controller/Entities/Studio.cs b/MediaBrowser.Controller/Entities/Studio.cs
index 9018ddb75..ae1d10447 100644
--- a/MediaBrowser.Controller/Entities/Studio.cs
+++ b/MediaBrowser.Controller/Entities/Studio.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/TV/Episode.cs b/MediaBrowser.Controller/Entities/TV/Episode.cs
index 70663ef47..2724bd9b3 100644
--- a/MediaBrowser.Controller/Entities/TV/Episode.cs
+++ b/MediaBrowser.Controller/Entities/TV/Episode.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/TV/Season.cs b/MediaBrowser.Controller/Entities/TV/Season.cs
index 5b8168d3d..ad3e0fe8d 100644
--- a/MediaBrowser.Controller/Entities/TV/Season.cs
+++ b/MediaBrowser.Controller/Entities/TV/Season.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/TV/Series.cs b/MediaBrowser.Controller/Entities/TV/Series.cs
index 06a405121..ded825abc 100644
--- a/MediaBrowser.Controller/Entities/TV/Series.cs
+++ b/MediaBrowser.Controller/Entities/TV/Series.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Trailer.cs b/MediaBrowser.Controller/Entities/Trailer.cs
index 9ae8ad708..b086b5906 100644
--- a/MediaBrowser.Controller/Entities/Trailer.cs
+++ b/MediaBrowser.Controller/Entities/Trailer.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/UserItemData.cs b/MediaBrowser.Controller/Entities/UserItemData.cs
index db63c42e4..f60359c01 100644
--- a/MediaBrowser.Controller/Entities/UserItemData.cs
+++ b/MediaBrowser.Controller/Entities/UserItemData.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/UserRootFolder.cs b/MediaBrowser.Controller/Entities/UserRootFolder.cs
index 7f7224ae0..e492740ed 100644
--- a/MediaBrowser.Controller/Entities/UserRootFolder.cs
+++ b/MediaBrowser.Controller/Entities/UserRootFolder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/UserView.cs b/MediaBrowser.Controller/Entities/UserView.cs
index fec83dd94..0dfde2766 100644
--- a/MediaBrowser.Controller/Entities/UserView.cs
+++ b/MediaBrowser.Controller/Entities/UserView.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/UserViewBuilder.cs b/MediaBrowser.Controller/Entities/UserViewBuilder.cs
index 78a64d8c9..15a4573c2 100644
--- a/MediaBrowser.Controller/Entities/UserViewBuilder.cs
+++ b/MediaBrowser.Controller/Entities/UserViewBuilder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Video.cs b/MediaBrowser.Controller/Entities/Video.cs
index 6320b01b8..723027a88 100644
--- a/MediaBrowser.Controller/Entities/Video.cs
+++ b/MediaBrowser.Controller/Entities/Video.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Entities/Year.cs b/MediaBrowser.Controller/Entities/Year.cs
index b2e4d307a..4d84a151a 100644
--- a/MediaBrowser.Controller/Entities/Year.cs
+++ b/MediaBrowser.Controller/Entities/Year.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Events/IEventConsumer.cs b/MediaBrowser.Controller/Events/IEventConsumer.cs
index 5c4ab5d8d..93005134a 100644
--- a/MediaBrowser.Controller/Events/IEventConsumer.cs
+++ b/MediaBrowser.Controller/Events/IEventConsumer.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Threading.Tasks;
 
 namespace MediaBrowser.Controller.Events
diff --git a/MediaBrowser.Controller/Events/IEventManager.cs b/MediaBrowser.Controller/Events/IEventManager.cs
index a1f40b3a6..074e3f1fe 100644
--- a/MediaBrowser.Controller/Events/IEventManager.cs
+++ b/MediaBrowser.Controller/Events/IEventManager.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Threading.Tasks;
 
 namespace MediaBrowser.Controller.Events
diff --git a/MediaBrowser.Controller/Events/Session/SessionEndedEventArgs.cs b/MediaBrowser.Controller/Events/Session/SessionEndedEventArgs.cs
index 46d7e5a17..3a331ad00 100644
--- a/MediaBrowser.Controller/Events/Session/SessionEndedEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Session/SessionEndedEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Controller.Session;
 
 namespace MediaBrowser.Controller.Events.Session
diff --git a/MediaBrowser.Controller/Events/Session/SessionStartedEventArgs.cs b/MediaBrowser.Controller/Events/Session/SessionStartedEventArgs.cs
index aab19cc46..deeaaf55d 100644
--- a/MediaBrowser.Controller/Events/Session/SessionStartedEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Session/SessionStartedEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Controller.Session;
 
 namespace MediaBrowser.Controller.Events.Session
diff --git a/MediaBrowser.Controller/Events/Updates/PluginInstallationCancelledEventArgs.cs b/MediaBrowser.Controller/Events/Updates/PluginInstallationCancelledEventArgs.cs
index b06046c05..0dd8b0dbf 100644
--- a/MediaBrowser.Controller/Events/Updates/PluginInstallationCancelledEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Updates/PluginInstallationCancelledEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Model.Updates;
 
 namespace MediaBrowser.Controller.Events.Updates
diff --git a/MediaBrowser.Controller/Events/Updates/PluginInstalledEventArgs.cs b/MediaBrowser.Controller/Events/Updates/PluginInstalledEventArgs.cs
index dfadc9f61..c1d503a7e 100644
--- a/MediaBrowser.Controller/Events/Updates/PluginInstalledEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Updates/PluginInstalledEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Model.Updates;
 
 namespace MediaBrowser.Controller.Events.Updates
diff --git a/MediaBrowser.Controller/Events/Updates/PluginInstallingEventArgs.cs b/MediaBrowser.Controller/Events/Updates/PluginInstallingEventArgs.cs
index 045a60027..7a9866834 100644
--- a/MediaBrowser.Controller/Events/Updates/PluginInstallingEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Updates/PluginInstallingEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Model.Updates;
 
 namespace MediaBrowser.Controller.Events.Updates
diff --git a/MediaBrowser.Controller/Events/Updates/PluginUpdatedEventArgs.cs b/MediaBrowser.Controller/Events/Updates/PluginUpdatedEventArgs.cs
index 661ca066a..b078e06dc 100644
--- a/MediaBrowser.Controller/Events/Updates/PluginUpdatedEventArgs.cs
+++ b/MediaBrowser.Controller/Events/Updates/PluginUpdatedEventArgs.cs
@@ -1,4 +1,4 @@
-using Jellyfin.Data.Events;
+using Jellyfin.Data.Events;
 using MediaBrowser.Model.Updates;
 
 namespace MediaBrowser.Controller.Events.Updates
diff --git a/MediaBrowser.Controller/Extensions/StringExtensions.cs b/MediaBrowser.Controller/Extensions/StringExtensions.cs
index 182c8ef65..8441a3171 100644
--- a/MediaBrowser.Controller/Extensions/StringExtensions.cs
+++ b/MediaBrowser.Controller/Extensions/StringExtensions.cs
@@ -1,4 +1,3 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/IDisplayPreferencesManager.cs b/MediaBrowser.Controller/IDisplayPreferencesManager.cs
index be1d974a4..1678d5067 100644
--- a/MediaBrowser.Controller/IDisplayPreferencesManager.cs
+++ b/MediaBrowser.Controller/IDisplayPreferencesManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using Jellyfin.Data.Entities;
diff --git a/MediaBrowser.Controller/IServerApplicationHost.cs b/MediaBrowser.Controller/IServerApplicationHost.cs
index 6a65a8e47..094923842 100644
--- a/MediaBrowser.Controller/IServerApplicationHost.cs
+++ b/MediaBrowser.Controller/IServerApplicationHost.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/IServerApplicationPaths.cs b/MediaBrowser.Controller/IServerApplicationPaths.cs
index be57d6bca..1890dbb36 100644
--- a/MediaBrowser.Controller/IServerApplicationPaths.cs
+++ b/MediaBrowser.Controller/IServerApplicationPaths.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Common.Configuration;
diff --git a/MediaBrowser.Controller/Library/IIntroProvider.cs b/MediaBrowser.Controller/Library/IIntroProvider.cs
index d45493d40..3bb1bd9a0 100644
--- a/MediaBrowser.Controller/Library/IIntroProvider.cs
+++ b/MediaBrowser.Controller/Library/IIntroProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using MediaBrowser.Controller.Entities;
diff --git a/MediaBrowser.Controller/Library/ILibraryManager.cs b/MediaBrowser.Controller/Library/ILibraryManager.cs
index 6d9b568da..782e15398 100644
--- a/MediaBrowser.Controller/Library/ILibraryManager.cs
+++ b/MediaBrowser.Controller/Library/ILibraryManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/ILiveStream.cs b/MediaBrowser.Controller/Library/ILiveStream.cs
index ff25be657..85d866de5 100644
--- a/MediaBrowser.Controller/Library/ILiveStream.cs
+++ b/MediaBrowser.Controller/Library/ILiveStream.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Threading;
diff --git a/MediaBrowser.Controller/Library/IMediaSourceManager.cs b/MediaBrowser.Controller/Library/IMediaSourceManager.cs
index 21c6ef2af..d3d85a056 100644
--- a/MediaBrowser.Controller/Library/IMediaSourceManager.cs
+++ b/MediaBrowser.Controller/Library/IMediaSourceManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/IMetadataSaver.cs b/MediaBrowser.Controller/Library/IMetadataSaver.cs
index 027cc5b40..5fbfad881 100644
--- a/MediaBrowser.Controller/Library/IMetadataSaver.cs
+++ b/MediaBrowser.Controller/Library/IMetadataSaver.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Entities;
 
diff --git a/MediaBrowser.Controller/Library/IMusicManager.cs b/MediaBrowser.Controller/Library/IMusicManager.cs
index d12f008e7..5329841bf 100644
--- a/MediaBrowser.Controller/Library/IMusicManager.cs
+++ b/MediaBrowser.Controller/Library/IMusicManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Library/IUserDataManager.cs b/MediaBrowser.Controller/Library/IUserDataManager.cs
index c6a83e4dc..58499e853 100644
--- a/MediaBrowser.Controller/Library/IUserDataManager.cs
+++ b/MediaBrowser.Controller/Library/IUserDataManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/IUserManager.cs b/MediaBrowser.Controller/Library/IUserManager.cs
index 6e267834b..c95b0ea32 100644
--- a/MediaBrowser.Controller/Library/IUserManager.cs
+++ b/MediaBrowser.Controller/Library/IUserManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/IUserViewManager.cs b/MediaBrowser.Controller/Library/IUserViewManager.cs
index 8d541e8b6..46004e42f 100644
--- a/MediaBrowser.Controller/Library/IUserViewManager.cs
+++ b/MediaBrowser.Controller/Library/IUserViewManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/IntroInfo.cs b/MediaBrowser.Controller/Library/IntroInfo.cs
index 283cc631c..90786786b 100644
--- a/MediaBrowser.Controller/Library/IntroInfo.cs
+++ b/MediaBrowser.Controller/Library/IntroInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/ItemChangeEventArgs.cs b/MediaBrowser.Controller/Library/ItemChangeEventArgs.cs
index 1798a4fad..a37dc7af1 100644
--- a/MediaBrowser.Controller/Library/ItemChangeEventArgs.cs
+++ b/MediaBrowser.Controller/Library/ItemChangeEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Controller.Entities;
diff --git a/MediaBrowser.Controller/Library/ItemResolveArgs.cs b/MediaBrowser.Controller/Library/ItemResolveArgs.cs
index 5f9aed341..0e2d8fb02 100644
--- a/MediaBrowser.Controller/Library/ItemResolveArgs.cs
+++ b/MediaBrowser.Controller/Library/ItemResolveArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/LibraryManagerExtensions.cs b/MediaBrowser.Controller/Library/LibraryManagerExtensions.cs
index 9581603f0..7bc8fa5ab 100644
--- a/MediaBrowser.Controller/Library/LibraryManagerExtensions.cs
+++ b/MediaBrowser.Controller/Library/LibraryManagerExtensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/MetadataConfigurationExtensions.cs b/MediaBrowser.Controller/Library/MetadataConfigurationExtensions.cs
index 884f9e773..41cfcae16 100644
--- a/MediaBrowser.Controller/Library/MetadataConfigurationExtensions.cs
+++ b/MediaBrowser.Controller/Library/MetadataConfigurationExtensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Common.Configuration;
diff --git a/MediaBrowser.Controller/Library/NameExtensions.cs b/MediaBrowser.Controller/Library/NameExtensions.cs
index 6e79dc8dd..29bfeca09 100644
--- a/MediaBrowser.Controller/Library/NameExtensions.cs
+++ b/MediaBrowser.Controller/Library/NameExtensions.cs
@@ -1,4 +1,3 @@
-#nullable enable
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/PlaybackProgressEventArgs.cs b/MediaBrowser.Controller/Library/PlaybackProgressEventArgs.cs
index a2be3a42a..609336ec4 100644
--- a/MediaBrowser.Controller/Library/PlaybackProgressEventArgs.cs
+++ b/MediaBrowser.Controller/Library/PlaybackProgressEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Library/PlaybackStartEventArgs.cs b/MediaBrowser.Controller/Library/PlaybackStartEventArgs.cs
index ac372bceb..2138fef58 100644
--- a/MediaBrowser.Controller/Library/PlaybackStartEventArgs.cs
+++ b/MediaBrowser.Controller/Library/PlaybackStartEventArgs.cs
@@ -1,4 +1,4 @@
-namespace MediaBrowser.Controller.Library
+namespace MediaBrowser.Controller.Library
 {
     /// <summary>
     /// An event that occurs when playback is started.
diff --git a/MediaBrowser.Controller/Library/Profiler.cs b/MediaBrowser.Controller/Library/Profiler.cs
index 5efdc6a48..8f42d3706 100644
--- a/MediaBrowser.Controller/Library/Profiler.cs
+++ b/MediaBrowser.Controller/Library/Profiler.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Diagnostics;
 using System.Globalization;
diff --git a/MediaBrowser.Controller/Library/SearchHintInfo.cs b/MediaBrowser.Controller/Library/SearchHintInfo.cs
index 897c2b7f4..de7806adc 100644
--- a/MediaBrowser.Controller/Library/SearchHintInfo.cs
+++ b/MediaBrowser.Controller/Library/SearchHintInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Controller.Entities;
 
 namespace MediaBrowser.Controller.Library
diff --git a/MediaBrowser.Controller/Library/TVUtils.cs b/MediaBrowser.Controller/Library/TVUtils.cs
index a3aa6019e..968338dc6 100644
--- a/MediaBrowser.Controller/Library/TVUtils.cs
+++ b/MediaBrowser.Controller/Library/TVUtils.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 
 namespace MediaBrowser.Controller.Library
 {
@@ -12,7 +13,8 @@ namespace MediaBrowser.Controller.Library
         /// </summary>
         /// <param name="day">The day.</param>
         /// <returns>List{DayOfWeek}.</returns>
-        public static DayOfWeek[] GetAirDays(string day)
+        [return: NotNullIfNotNull("day")]
+        public static DayOfWeek[]? GetAirDays(string? day)
         {
             if (!string.IsNullOrEmpty(day))
             {
diff --git a/MediaBrowser.Controller/Library/UserDataSaveEventArgs.cs b/MediaBrowser.Controller/Library/UserDataSaveEventArgs.cs
index cd9109753..bfe433c97 100644
--- a/MediaBrowser.Controller/Library/UserDataSaveEventArgs.cs
+++ b/MediaBrowser.Controller/Library/UserDataSaveEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/ChannelInfo.cs b/MediaBrowser.Controller/LiveTv/ChannelInfo.cs
index 166c4d77c..a55fd670d 100644
--- a/MediaBrowser.Controller/LiveTv/ChannelInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/ChannelInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.LiveTv;
diff --git a/MediaBrowser.Controller/LiveTv/IListingsProvider.cs b/MediaBrowser.Controller/LiveTv/IListingsProvider.cs
index 038ff2eae..2bd4b20e8 100644
--- a/MediaBrowser.Controller/LiveTv/IListingsProvider.cs
+++ b/MediaBrowser.Controller/LiveTv/IListingsProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/ILiveTvManager.cs b/MediaBrowser.Controller/LiveTv/ILiveTvManager.cs
index 54495c1c4..c28e0426b 100644
--- a/MediaBrowser.Controller/LiveTv/ILiveTvManager.cs
+++ b/MediaBrowser.Controller/LiveTv/ILiveTvManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/ILiveTvService.cs b/MediaBrowser.Controller/LiveTv/ILiveTvService.cs
index 3ca1d165e..897f263f3 100644
--- a/MediaBrowser.Controller/LiveTv/ILiveTvService.cs
+++ b/MediaBrowser.Controller/LiveTv/ILiveTvService.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/ITunerHost.cs b/MediaBrowser.Controller/LiveTv/ITunerHost.cs
index abca8f239..7dced9f5e 100644
--- a/MediaBrowser.Controller/LiveTv/ITunerHost.cs
+++ b/MediaBrowser.Controller/LiveTv/ITunerHost.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/LiveTv/LiveTvChannel.cs b/MediaBrowser.Controller/LiveTv/LiveTvChannel.cs
index 76dfcd28c..02678cfb6 100644
--- a/MediaBrowser.Controller/LiveTv/LiveTvChannel.cs
+++ b/MediaBrowser.Controller/LiveTv/LiveTvChannel.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs b/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
index 43af495dd..d9634a731 100644
--- a/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
+++ b/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/LiveTvServiceStatusInfo.cs b/MediaBrowser.Controller/LiveTv/LiveTvServiceStatusInfo.cs
index b62974904..eb3babc18 100644
--- a/MediaBrowser.Controller/LiveTv/LiveTvServiceStatusInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/LiveTvServiceStatusInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/LiveTv/LiveTvTunerInfo.cs b/MediaBrowser.Controller/LiveTv/LiveTvTunerInfo.cs
index 739978e7c..aa5eb59d1 100644
--- a/MediaBrowser.Controller/LiveTv/LiveTvTunerInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/LiveTvTunerInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/LiveTv/ProgramInfo.cs b/MediaBrowser.Controller/LiveTv/ProgramInfo.cs
index f9f559ee9..4a977c5cc 100644
--- a/MediaBrowser.Controller/LiveTv/ProgramInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/ProgramInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/RecordingInfo.cs b/MediaBrowser.Controller/LiveTv/RecordingInfo.cs
index 69190694f..00135afa8 100644
--- a/MediaBrowser.Controller/LiveTv/RecordingInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/RecordingInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/RecordingStatusChangedEventArgs.cs b/MediaBrowser.Controller/LiveTv/RecordingStatusChangedEventArgs.cs
index 847c0ea8c..0b943c939 100644
--- a/MediaBrowser.Controller/LiveTv/RecordingStatusChangedEventArgs.cs
+++ b/MediaBrowser.Controller/LiveTv/RecordingStatusChangedEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/SeriesTimerInfo.cs b/MediaBrowser.Controller/LiveTv/SeriesTimerInfo.cs
index 1343ecd98..1bb649a99 100644
--- a/MediaBrowser.Controller/LiveTv/SeriesTimerInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/SeriesTimerInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/TimerEventInfo.cs b/MediaBrowser.Controller/LiveTv/TimerEventInfo.cs
index 1b8f41db6..728387c56 100644
--- a/MediaBrowser.Controller/LiveTv/TimerEventInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/TimerEventInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #nullable enable
 #pragma warning disable CS1591
 
diff --git a/MediaBrowser.Controller/LiveTv/TimerInfo.cs b/MediaBrowser.Controller/LiveTv/TimerInfo.cs
index aa5170617..e54dc967c 100644
--- a/MediaBrowser.Controller/LiveTv/TimerInfo.cs
+++ b/MediaBrowser.Controller/LiveTv/TimerInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/LiveTv/TunerChannelMapping.cs b/MediaBrowser.Controller/LiveTv/TunerChannelMapping.cs
index 2759b314f..1c1a4417d 100644
--- a/MediaBrowser.Controller/LiveTv/TunerChannelMapping.cs
+++ b/MediaBrowser.Controller/LiveTv/TunerChannelMapping.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.LiveTv
diff --git a/MediaBrowser.Controller/MediaBrowser.Controller.csproj b/MediaBrowser.Controller/MediaBrowser.Controller.csproj
index 8c68b47dd..37ce35fc2 100644
--- a/MediaBrowser.Controller/MediaBrowser.Controller.csproj
+++ b/MediaBrowser.Controller/MediaBrowser.Controller.csproj
@@ -34,6 +34,7 @@
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <TreatWarningsAsErrors Condition=" '$(Configuration)' == 'Release' ">true</TreatWarningsAsErrors>
+    <Nullable>enable</Nullable>
     <AnalysisMode Condition=" '$(Configuration)' == 'Debug' ">AllEnabledByDefault</AnalysisMode>
     <CodeAnalysisRuleSet>../jellyfin.ruleset</CodeAnalysisRuleSet>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index 2b5364775..97cb8d63b 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
index d47a689f4..1e13382b7 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingJobOptions.cs b/MediaBrowser.Controller/MediaEncoding/EncodingJobOptions.cs
index 1f3abe8f4..88de5b292 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingJobOptions.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingJobOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/MediaEncoding/IAttachmentExtractor.cs b/MediaBrowser.Controller/MediaEncoding/IAttachmentExtractor.cs
index fbc827534..c38e7ec3b 100644
--- a/MediaBrowser.Controller/MediaEncoding/IAttachmentExtractor.cs
+++ b/MediaBrowser.Controller/MediaEncoding/IAttachmentExtractor.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.IO;
diff --git a/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs b/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs
index 15a2580af..773547872 100644
--- a/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs
+++ b/MediaBrowser.Controller/MediaEncoding/IEncodingManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
index 05dd1a69b..d3260280a 100644
--- a/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
+++ b/MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs b/MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs
index 6ebf7f159..3fb2c47e1 100644
--- a/MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs
+++ b/MediaBrowser.Controller/MediaEncoding/ISubtitleEncoder.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.IO;
diff --git a/MediaBrowser.Controller/MediaEncoding/ImageEncodingOptions.cs b/MediaBrowser.Controller/MediaEncoding/ImageEncodingOptions.cs
index e7b4c8c15..044ba6d33 100644
--- a/MediaBrowser.Controller/MediaEncoding/ImageEncodingOptions.cs
+++ b/MediaBrowser.Controller/MediaEncoding/ImageEncodingOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.MediaEncoding
diff --git a/MediaBrowser.Controller/MediaEncoding/JobLogger.cs b/MediaBrowser.Controller/MediaEncoding/JobLogger.cs
index 227c5f258..aa5e2c403 100644
--- a/MediaBrowser.Controller/MediaEncoding/JobLogger.cs
+++ b/MediaBrowser.Controller/MediaEncoding/JobLogger.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs b/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs
index 89e01c08b..841e7b287 100644
--- a/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs
+++ b/MediaBrowser.Controller/MediaEncoding/MediaEncoderHelpers.cs
@@ -1,6 +1,5 @@
 #pragma warning disable CS1591
 
-
 namespace MediaBrowser.Controller.MediaEncoding
 {
     /// <summary>
diff --git a/MediaBrowser.Controller/MediaEncoding/MediaInfoRequest.cs b/MediaBrowser.Controller/MediaEncoding/MediaInfoRequest.cs
index 2cb04bdc4..1dd8bcf31 100644
--- a/MediaBrowser.Controller/MediaEncoding/MediaInfoRequest.cs
+++ b/MediaBrowser.Controller/MediaEncoding/MediaInfoRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.Dlna;
diff --git a/MediaBrowser.Controller/Net/AuthorizationInfo.cs b/MediaBrowser.Controller/Net/AuthorizationInfo.cs
index 93573e08e..2452b25ab 100644
--- a/MediaBrowser.Controller/Net/AuthorizationInfo.cs
+++ b/MediaBrowser.Controller/Net/AuthorizationInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using Jellyfin.Data.Entities;
 
diff --git a/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs b/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
index 163a9c8f8..855467e8e 100644
--- a/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
+++ b/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Net/IAuthService.cs b/MediaBrowser.Controller/Net/IAuthService.cs
index 04b2e13e8..d15c6d318 100644
--- a/MediaBrowser.Controller/Net/IAuthService.cs
+++ b/MediaBrowser.Controller/Net/IAuthService.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using Microsoft.AspNetCore.Http;
 
 namespace MediaBrowser.Controller.Net
diff --git a/MediaBrowser.Controller/Net/IWebSocketConnection.cs b/MediaBrowser.Controller/Net/IWebSocketConnection.cs
index e87f3bca6..5e9fce550 100644
--- a/MediaBrowser.Controller/Net/IWebSocketConnection.cs
+++ b/MediaBrowser.Controller/Net/IWebSocketConnection.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 #nullable enable
diff --git a/MediaBrowser.Controller/Net/SecurityException.cs b/MediaBrowser.Controller/Net/SecurityException.cs
index c6347133a..f0d0b45a0 100644
--- a/MediaBrowser.Controller/Net/SecurityException.cs
+++ b/MediaBrowser.Controller/Net/SecurityException.cs
@@ -1,5 +1,3 @@
-#nullable enable
-
 using System;
 
 namespace MediaBrowser.Controller.Net
diff --git a/MediaBrowser.Controller/Net/WebSocketMessageInfo.cs b/MediaBrowser.Controller/Net/WebSocketMessageInfo.cs
index be0b3ddc3..6f7ebf156 100644
--- a/MediaBrowser.Controller/Net/WebSocketMessageInfo.cs
+++ b/MediaBrowser.Controller/Net/WebSocketMessageInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Model.Net;
 
 namespace MediaBrowser.Controller.Net
diff --git a/MediaBrowser.Controller/Notifications/INotificationManager.cs b/MediaBrowser.Controller/Notifications/INotificationManager.cs
index 08d9bc12a..7caba1097 100644
--- a/MediaBrowser.Controller/Notifications/INotificationManager.cs
+++ b/MediaBrowser.Controller/Notifications/INotificationManager.cs
@@ -19,7 +19,7 @@ namespace MediaBrowser.Controller.Notifications
         /// <returns>Task.</returns>
         Task SendNotification(NotificationRequest request, CancellationToken cancellationToken);
 
-        Task SendNotification(NotificationRequest request, BaseItem relatedItem, CancellationToken cancellationToken);
+        Task SendNotification(NotificationRequest request, BaseItem? relatedItem, CancellationToken cancellationToken);
 
         /// <summary>
         /// Adds the parts.
diff --git a/MediaBrowser.Controller/Notifications/INotificationService.cs b/MediaBrowser.Controller/Notifications/INotificationService.cs
index fa947220a..535c08795 100644
--- a/MediaBrowser.Controller/Notifications/INotificationService.cs
+++ b/MediaBrowser.Controller/Notifications/INotificationService.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Threading;
diff --git a/MediaBrowser.Controller/Notifications/UserNotification.cs b/MediaBrowser.Controller/Notifications/UserNotification.cs
index d768abfe7..4be0e09ae 100644
--- a/MediaBrowser.Controller/Notifications/UserNotification.cs
+++ b/MediaBrowser.Controller/Notifications/UserNotification.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Persistence/IItemRepository.cs b/MediaBrowser.Controller/Persistence/IItemRepository.cs
index ed473c749..56fb36af2 100644
--- a/MediaBrowser.Controller/Persistence/IItemRepository.cs
+++ b/MediaBrowser.Controller/Persistence/IItemRepository.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Persistence/IUserDataRepository.cs b/MediaBrowser.Controller/Persistence/IUserDataRepository.cs
index 81ba513ce..6f5f02123 100644
--- a/MediaBrowser.Controller/Persistence/IUserDataRepository.cs
+++ b/MediaBrowser.Controller/Persistence/IUserDataRepository.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Collections.Generic;
 using System.Threading;
 using MediaBrowser.Controller.Entities;
diff --git a/MediaBrowser.Controller/Playlists/Playlist.cs b/MediaBrowser.Controller/Playlists/Playlist.cs
index 3c93cfc79..a80c11643 100644
--- a/MediaBrowser.Controller/Playlists/Playlist.cs
+++ b/MediaBrowser.Controller/Playlists/Playlist.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Plugins/ILocalizablePlugin.cs b/MediaBrowser.Controller/Plugins/ILocalizablePlugin.cs
deleted file mode 100644
index bf15fe040..000000000
--- a/MediaBrowser.Controller/Plugins/ILocalizablePlugin.cs
+++ /dev/null
@@ -1,22 +0,0 @@
-#pragma warning disable CS1591
-
-using System.IO;
-using System.Reflection;
-
-namespace MediaBrowser.Controller.Plugins
-{
-    public interface ILocalizablePlugin
-    {
-        Stream GetDictionary(string culture);
-    }
-
-    public static class LocalizablePluginHelper
-    {
-        public static Stream GetDictionary(Assembly assembly, string manifestPrefix, string culture)
-        {
-            // Find all dictionaries using GetManifestResourceNames, start start with the prefix
-            // Return the one for the culture if exists, otherwise return the default
-            return null;
-        }
-    }
-}
diff --git a/MediaBrowser.Controller/Providers/BookInfo.cs b/MediaBrowser.Controller/Providers/BookInfo.cs
index cce0a25fc..3055c5d87 100644
--- a/MediaBrowser.Controller/Providers/BookInfo.cs
+++ b/MediaBrowser.Controller/Providers/BookInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Providers
diff --git a/MediaBrowser.Controller/Providers/DirectoryService.cs b/MediaBrowser.Controller/Providers/DirectoryService.cs
index 5c92069b4..291a26883 100644
--- a/MediaBrowser.Controller/Providers/DirectoryService.cs
+++ b/MediaBrowser.Controller/Providers/DirectoryService.cs
@@ -43,18 +43,17 @@ namespace MediaBrowser.Controller.Providers
             return list;
         }
 
-        public FileSystemMetadata GetFile(string path)
+        public FileSystemMetadata? GetFile(string path)
         {
-            var result = _fileCache.GetOrAdd(path, p =>
+            if (!_fileCache.TryGetValue(path, out var result))
             {
-                var file = _fileSystem.GetFileInfo(p);
-                return file != null && file.Exists ? file : null;
-            });
-
-            if (result == null)
-            {
-                // lets not store null results in the cache
-                _fileCache.TryRemove(path, out _);
+                var file = _fileSystem.GetFileInfo(path);
+                var res = file != null && file.Exists ? file : null;
+                if (res != null)
+                {
+                    result = res;
+                    _fileCache.TryAdd(path, result);
+                }
             }
 
             return result;
diff --git a/MediaBrowser.Controller/Providers/DynamicImageResponse.cs b/MediaBrowser.Controller/Providers/DynamicImageResponse.cs
index 006174be8..66fddb0e3 100644
--- a/MediaBrowser.Controller/Providers/DynamicImageResponse.cs
+++ b/MediaBrowser.Controller/Providers/DynamicImageResponse.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/EpisodeInfo.cs b/MediaBrowser.Controller/Providers/EpisodeInfo.cs
index a4c8dab7e..341bf6936 100644
--- a/MediaBrowser.Controller/Providers/EpisodeInfo.cs
+++ b/MediaBrowser.Controller/Providers/EpisodeInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/IDirectoryService.cs b/MediaBrowser.Controller/Providers/IDirectoryService.cs
index f06481c7a..9cee06a4c 100644
--- a/MediaBrowser.Controller/Providers/IDirectoryService.cs
+++ b/MediaBrowser.Controller/Providers/IDirectoryService.cs
@@ -11,7 +11,7 @@ namespace MediaBrowser.Controller.Providers
 
         List<FileSystemMetadata> GetFiles(string path);
 
-        FileSystemMetadata GetFile(string path);
+        FileSystemMetadata? GetFile(string path);
 
         IReadOnlyList<string> GetFilePaths(string path);
 
diff --git a/MediaBrowser.Controller/Providers/IExternalId.cs b/MediaBrowser.Controller/Providers/IExternalId.cs
index 5e38446bc..e2dbef2bc 100644
--- a/MediaBrowser.Controller/Providers/IExternalId.cs
+++ b/MediaBrowser.Controller/Providers/IExternalId.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Providers;
 
diff --git a/MediaBrowser.Controller/Providers/IProviderManager.cs b/MediaBrowser.Controller/Providers/IProviderManager.cs
index 7bc56c82a..b4d91f396 100644
--- a/MediaBrowser.Controller/Providers/IProviderManager.cs
+++ b/MediaBrowser.Controller/Providers/IProviderManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/ImageRefreshOptions.cs b/MediaBrowser.Controller/Providers/ImageRefreshOptions.cs
index 9fc379f04..81a22affb 100644
--- a/MediaBrowser.Controller/Providers/ImageRefreshOptions.cs
+++ b/MediaBrowser.Controller/Providers/ImageRefreshOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/ItemInfo.cs b/MediaBrowser.Controller/Providers/ItemInfo.cs
index 3a97127ea..b8dd416a2 100644
--- a/MediaBrowser.Controller/Providers/ItemInfo.cs
+++ b/MediaBrowser.Controller/Providers/ItemInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/ItemLookupInfo.cs b/MediaBrowser.Controller/Providers/ItemLookupInfo.cs
index b777cc1d3..f16669a78 100644
--- a/MediaBrowser.Controller/Providers/ItemLookupInfo.cs
+++ b/MediaBrowser.Controller/Providers/ItemLookupInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/LocalImageInfo.cs b/MediaBrowser.Controller/Providers/LocalImageInfo.cs
index 41801862f..a8e70e6d0 100644
--- a/MediaBrowser.Controller/Providers/LocalImageInfo.cs
+++ b/MediaBrowser.Controller/Providers/LocalImageInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.Entities;
diff --git a/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs b/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
index db0ef7072..5afc358ba 100644
--- a/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
+++ b/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/MetadataResult.cs b/MediaBrowser.Controller/Providers/MetadataResult.cs
index 98c7eadfe..8b0967a6e 100644
--- a/MediaBrowser.Controller/Providers/MetadataResult.cs
+++ b/MediaBrowser.Controller/Providers/MetadataResult.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/MusicVideoInfo.cs b/MediaBrowser.Controller/Providers/MusicVideoInfo.cs
index 0b927f6eb..322320abd 100644
--- a/MediaBrowser.Controller/Providers/MusicVideoInfo.cs
+++ b/MediaBrowser.Controller/Providers/MusicVideoInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Providers/RemoteSearchQuery.cs b/MediaBrowser.Controller/Providers/RemoteSearchQuery.cs
index 9653bc1c4..d830231cf 100644
--- a/MediaBrowser.Controller/Providers/RemoteSearchQuery.cs
+++ b/MediaBrowser.Controller/Providers/RemoteSearchQuery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Providers/SongInfo.cs b/MediaBrowser.Controller/Providers/SongInfo.cs
index 58f76dca9..c90717a2e 100644
--- a/MediaBrowser.Controller/Providers/SongInfo.cs
+++ b/MediaBrowser.Controller/Providers/SongInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/QuickConnect/IQuickConnect.cs b/MediaBrowser.Controller/QuickConnect/IQuickConnect.cs
index 959a2d771..c4e709c24 100644
--- a/MediaBrowser.Controller/QuickConnect/IQuickConnect.cs
+++ b/MediaBrowser.Controller/QuickConnect/IQuickConnect.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using MediaBrowser.Model.QuickConnect;
 
diff --git a/MediaBrowser.Controller/Resolvers/BaseItemResolver.cs b/MediaBrowser.Controller/Resolvers/BaseItemResolver.cs
index a904c7424..e77593a03 100644
--- a/MediaBrowser.Controller/Resolvers/BaseItemResolver.cs
+++ b/MediaBrowser.Controller/Resolvers/BaseItemResolver.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 
diff --git a/MediaBrowser.Controller/Security/AuthenticationInfo.cs b/MediaBrowser.Controller/Security/AuthenticationInfo.cs
index efac9273e..b4b242f1b 100644
--- a/MediaBrowser.Controller/Security/AuthenticationInfo.cs
+++ b/MediaBrowser.Controller/Security/AuthenticationInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Security/AuthenticationInfoQuery.cs b/MediaBrowser.Controller/Security/AuthenticationInfoQuery.cs
index c5f3da0b1..3af6a525c 100644
--- a/MediaBrowser.Controller/Security/AuthenticationInfoQuery.cs
+++ b/MediaBrowser.Controller/Security/AuthenticationInfoQuery.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Security/IAuthenticationRepository.cs b/MediaBrowser.Controller/Security/IAuthenticationRepository.cs
index 883b74165..1dd69ccd8 100644
--- a/MediaBrowser.Controller/Security/IAuthenticationRepository.cs
+++ b/MediaBrowser.Controller/Security/IAuthenticationRepository.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using MediaBrowser.Model.Devices;
diff --git a/MediaBrowser.Controller/Session/AuthenticationRequest.cs b/MediaBrowser.Controller/Session/AuthenticationRequest.cs
index 8c3ac58f2..647c75e66 100644
--- a/MediaBrowser.Controller/Session/AuthenticationRequest.cs
+++ b/MediaBrowser.Controller/Session/AuthenticationRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Session/ISessionController.cs b/MediaBrowser.Controller/Session/ISessionController.cs
index bc4ccd44c..6bc39d6f4 100644
--- a/MediaBrowser.Controller/Session/ISessionController.cs
+++ b/MediaBrowser.Controller/Session/ISessionController.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Session/ISessionManager.cs b/MediaBrowser.Controller/Session/ISessionManager.cs
index 6c06dcad5..7eda49c60 100644
--- a/MediaBrowser.Controller/Session/ISessionManager.cs
+++ b/MediaBrowser.Controller/Session/ISessionManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Session/SessionEventArgs.cs b/MediaBrowser.Controller/Session/SessionEventArgs.cs
index 097e32eae..269fe7dc4 100644
--- a/MediaBrowser.Controller/Session/SessionEventArgs.cs
+++ b/MediaBrowser.Controller/Session/SessionEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Session/SessionInfo.cs b/MediaBrowser.Controller/Session/SessionInfo.cs
index d09852870..5da3783bf 100644
--- a/MediaBrowser.Controller/Session/SessionInfo.cs
+++ b/MediaBrowser.Controller/Session/SessionInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Sorting/AlphanumComparator.cs b/MediaBrowser.Controller/Sorting/AlphanumComparator.cs
index 70cb9eebe..4d9b98889 100644
--- a/MediaBrowser.Controller/Sorting/AlphanumComparator.cs
+++ b/MediaBrowser.Controller/Sorting/AlphanumComparator.cs
@@ -1,7 +1,5 @@
 #pragma warning disable CS1591
 
-#nullable enable
-
 using System;
 using System.Collections.Generic;
 
diff --git a/MediaBrowser.Controller/Sorting/IUserBaseItemComparer.cs b/MediaBrowser.Controller/Sorting/IUserBaseItemComparer.cs
index 6d03d97ae..bd47db39a 100644
--- a/MediaBrowser.Controller/Sorting/IUserBaseItemComparer.cs
+++ b/MediaBrowser.Controller/Sorting/IUserBaseItemComparer.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Controller.Library;
 
 namespace MediaBrowser.Controller.Sorting
diff --git a/MediaBrowser.Controller/Sorting/SortExtensions.cs b/MediaBrowser.Controller/Sorting/SortExtensions.cs
index 88467814c..aa6ec513f 100644
--- a/MediaBrowser.Controller/Sorting/SortExtensions.cs
+++ b/MediaBrowser.Controller/Sorting/SortExtensions.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Subtitles/ISubtitleManager.cs b/MediaBrowser.Controller/Subtitles/ISubtitleManager.cs
index 6d63286ef..9e661cbe4 100644
--- a/MediaBrowser.Controller/Subtitles/ISubtitleManager.cs
+++ b/MediaBrowser.Controller/Subtitles/ISubtitleManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Subtitles/ISubtitleProvider.cs b/MediaBrowser.Controller/Subtitles/ISubtitleProvider.cs
index a633262de..326348d58 100644
--- a/MediaBrowser.Controller/Subtitles/ISubtitleProvider.cs
+++ b/MediaBrowser.Controller/Subtitles/ISubtitleProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Subtitles/SubtitleDownloadFailureEventArgs.cs b/MediaBrowser.Controller/Subtitles/SubtitleDownloadFailureEventArgs.cs
index ce8141219..c782f5796 100644
--- a/MediaBrowser.Controller/Subtitles/SubtitleDownloadFailureEventArgs.cs
+++ b/MediaBrowser.Controller/Subtitles/SubtitleDownloadFailureEventArgs.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using MediaBrowser.Controller.Entities;
 
diff --git a/MediaBrowser.Controller/Subtitles/SubtitleResponse.cs b/MediaBrowser.Controller/Subtitles/SubtitleResponse.cs
index a86b05778..85b3e6fbd 100644
--- a/MediaBrowser.Controller/Subtitles/SubtitleResponse.cs
+++ b/MediaBrowser.Controller/Subtitles/SubtitleResponse.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.IO;
diff --git a/MediaBrowser.Controller/Subtitles/SubtitleSearchRequest.cs b/MediaBrowser.Controller/Subtitles/SubtitleSearchRequest.cs
index 7d3c20e8f..0f7c47e76 100644
--- a/MediaBrowser.Controller/Subtitles/SubtitleSearchRequest.cs
+++ b/MediaBrowser.Controller/Subtitles/SubtitleSearchRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Sync/IHasDynamicAccess.cs b/MediaBrowser.Controller/Sync/IHasDynamicAccess.cs
index e7395b136..3d3e44da0 100644
--- a/MediaBrowser.Controller/Sync/IHasDynamicAccess.cs
+++ b/MediaBrowser.Controller/Sync/IHasDynamicAccess.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Threading;
diff --git a/MediaBrowser.Controller/Sync/IServerSyncProvider.cs b/MediaBrowser.Controller/Sync/IServerSyncProvider.cs
index c97fd7044..3891ac0a6 100644
--- a/MediaBrowser.Controller/Sync/IServerSyncProvider.cs
+++ b/MediaBrowser.Controller/Sync/IServerSyncProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System;
diff --git a/MediaBrowser.Controller/Sync/ISyncProvider.cs b/MediaBrowser.Controller/Sync/ISyncProvider.cs
index 950cc73e8..ea20014c7 100644
--- a/MediaBrowser.Controller/Sync/ISyncProvider.cs
+++ b/MediaBrowser.Controller/Sync/ISyncProvider.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/Sync/SyncedFileInfo.cs b/MediaBrowser.Controller/Sync/SyncedFileInfo.cs
index a626738fb..7eac52299 100644
--- a/MediaBrowser.Controller/Sync/SyncedFileInfo.cs
+++ b/MediaBrowser.Controller/Sync/SyncedFileInfo.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 #pragma warning disable CS1591
 
 using System.Collections.Generic;
diff --git a/MediaBrowser.Controller/SyncPlay/GroupMember.cs b/MediaBrowser.Controller/SyncPlay/GroupMember.cs
index 5fb982e85..7e7e759a5 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupMember.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupMember.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using MediaBrowser.Controller.Session;
 
 namespace MediaBrowser.Controller.SyncPlay
diff --git a/MediaBrowser.Controller/SyncPlay/GroupStates/AbstractGroupState.cs b/MediaBrowser.Controller/SyncPlay/GroupStates/AbstractGroupState.cs
index e3de22db3..91a13fb28 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupStates/AbstractGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupStates/AbstractGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Controller.SyncPlay.PlaybackRequests;
diff --git a/MediaBrowser.Controller/SyncPlay/GroupStates/IdleGroupState.cs b/MediaBrowser.Controller/SyncPlay/GroupStates/IdleGroupState.cs
index 12ce6c8f8..6b5a7cdf9 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupStates/IdleGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupStates/IdleGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Controller.SyncPlay.PlaybackRequests;
diff --git a/MediaBrowser.Controller/SyncPlay/GroupStates/PausedGroupState.cs b/MediaBrowser.Controller/SyncPlay/GroupStates/PausedGroupState.cs
index fba8ba9e2..b9786ddb0 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupStates/PausedGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupStates/PausedGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/GroupStates/PlayingGroupState.cs b/MediaBrowser.Controller/SyncPlay/GroupStates/PlayingGroupState.cs
index 9797b247c..cb1cadf0b 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupStates/PlayingGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupStates/PlayingGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/GroupStates/WaitingGroupState.cs b/MediaBrowser.Controller/SyncPlay/GroupStates/WaitingGroupState.cs
index 507573653..a0c38b309 100644
--- a/MediaBrowser.Controller/SyncPlay/GroupStates/WaitingGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/GroupStates/WaitingGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/IGroupPlaybackRequest.cs b/MediaBrowser.Controller/SyncPlay/IGroupPlaybackRequest.cs
index 201f29952..9045063ee 100644
--- a/MediaBrowser.Controller/SyncPlay/IGroupPlaybackRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/IGroupPlaybackRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/IGroupState.cs b/MediaBrowser.Controller/SyncPlay/IGroupState.cs
index 95ee09985..0666a62a8 100644
--- a/MediaBrowser.Controller/SyncPlay/IGroupState.cs
+++ b/MediaBrowser.Controller/SyncPlay/IGroupState.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Controller.SyncPlay.PlaybackRequests;
diff --git a/MediaBrowser.Controller/SyncPlay/IGroupStateContext.cs b/MediaBrowser.Controller/SyncPlay/IGroupStateContext.cs
index aa263638a..de26c7d9e 100644
--- a/MediaBrowser.Controller/SyncPlay/IGroupStateContext.cs
+++ b/MediaBrowser.Controller/SyncPlay/IGroupStateContext.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Controller/SyncPlay/ISyncPlayManager.cs b/MediaBrowser.Controller/SyncPlay/ISyncPlayManager.cs
index 1c954828c..a6999a12c 100644
--- a/MediaBrowser.Controller/SyncPlay/ISyncPlayManager.cs
+++ b/MediaBrowser.Controller/SyncPlay/ISyncPlayManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/AbstractPlaybackRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/AbstractPlaybackRequest.cs
index 4090f65b9..ef496c103 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/AbstractPlaybackRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/AbstractPlaybackRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/BufferGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/BufferGroupRequest.cs
index 11cc99fcd..d188114c3 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/BufferGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/BufferGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/IgnoreWaitGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/IgnoreWaitGroupRequest.cs
index 64ef791ed..464c81dfd 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/IgnoreWaitGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/IgnoreWaitGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/MovePlaylistItemGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/MovePlaylistItemGroupRequest.cs
index 9cd8da566..be314e807 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/MovePlaylistItemGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/MovePlaylistItemGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/NextItemGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/NextItemGroupRequest.cs
index e0ae0deb7..679076239 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/NextItemGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/NextItemGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PauseGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PauseGroupRequest.cs
index 2869b35f7..7ee18a366 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PauseGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PauseGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PingGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PingGroupRequest.cs
index 8ef3b2030..beab655c5 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PingGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PingGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PlayGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PlayGroupRequest.cs
index 16f9b4087..05ff262c1 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PlayGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PlayGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PreviousItemGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PreviousItemGroupRequest.cs
index 166ee0800..3e34b6ce4 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PreviousItemGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/PreviousItemGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/QueueGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/QueueGroupRequest.cs
index d4af63b6d..0f91476de 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/QueueGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/QueueGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/ReadyGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/ReadyGroupRequest.cs
index 74f01cbea..b1f0bd360 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/ReadyGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/ReadyGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/RemoveFromPlaylistGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/RemoveFromPlaylistGroupRequest.cs
index 47c06c222..689145293 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/RemoveFromPlaylistGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/RemoveFromPlaylistGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SeekGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SeekGroupRequest.cs
index ecaa689ae..196113374 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SeekGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SeekGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetPlaylistItemGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetPlaylistItemGroupRequest.cs
index c3451703e..44df127a6 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetPlaylistItemGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetPlaylistItemGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Threading;
 using MediaBrowser.Controller.Session;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetRepeatModeGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetRepeatModeGroupRequest.cs
index 51011672e..d250eab56 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetRepeatModeGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetRepeatModeGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetShuffleModeGroupRequest.cs b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetShuffleModeGroupRequest.cs
index d7b2504b4..5034e992e 100644
--- a/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetShuffleModeGroupRequest.cs
+++ b/MediaBrowser.Controller/SyncPlay/PlaybackRequests/SetShuffleModeGroupRequest.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System.Threading;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.SyncPlay;
diff --git a/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs b/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
index fdec29417..b8ae9f3ff 100644
--- a/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
+++ b/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
@@ -1,3 +1,5 @@
+#nullable disable
+
 using System;
 using System.Collections.Generic;
 using System.Linq;
diff --git a/MediaBrowser.LocalMetadata/BaseXmlProvider.cs b/MediaBrowser.LocalMetadata/BaseXmlProvider.cs
index b036a2cc8..9f8e921b4 100644
--- a/MediaBrowser.LocalMetadata/BaseXmlProvider.cs
+++ b/MediaBrowser.LocalMetadata/BaseXmlProvider.cs
@@ -91,7 +91,7 @@ namespace MediaBrowser.LocalMetadata
         /// <param name="info">Item inf.</param>
         /// <param name="directoryService">Instance of the <see cref="IDirectoryService"/> interface.</param>
         /// <returns>The file system metadata.</returns>
-        protected abstract FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService);
+        protected abstract FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService);
 
         /// <inheritdoc />
         public bool HasChanged(BaseItem item, IDirectoryService directoryService)
diff --git a/MediaBrowser.LocalMetadata/Images/EpisodeLocalImageProvider.cs b/MediaBrowser.LocalMetadata/Images/EpisodeLocalImageProvider.cs
index 2d3b2d889..bc62ca4d5 100644
--- a/MediaBrowser.LocalMetadata/Images/EpisodeLocalImageProvider.cs
+++ b/MediaBrowser.LocalMetadata/Images/EpisodeLocalImageProvider.cs
@@ -42,6 +42,10 @@ namespace MediaBrowser.LocalMetadata.Images
         public IEnumerable<LocalImageInfo> GetImages(BaseItem item, IDirectoryService directoryService)
         {
             var parentPath = Path.GetDirectoryName(item.Path);
+            if (parentPath == null)
+            {
+                return Enumerable.Empty<LocalImageInfo>();
+            }
 
             var parentPathFiles = directoryService.GetFiles(parentPath);
 
diff --git a/MediaBrowser.LocalMetadata/Providers/BoxSetXmlProvider.cs b/MediaBrowser.LocalMetadata/Providers/BoxSetXmlProvider.cs
index cc705a9df..ea123bbf2 100644
--- a/MediaBrowser.LocalMetadata/Providers/BoxSetXmlProvider.cs
+++ b/MediaBrowser.LocalMetadata/Providers/BoxSetXmlProvider.cs
@@ -36,7 +36,7 @@ namespace MediaBrowser.LocalMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
         {
             return directoryService.GetFile(Path.Combine(info.Path, "collection.xml"));
         }
diff --git a/MediaBrowser.LocalMetadata/Providers/PlaylistXmlProvider.cs b/MediaBrowser.LocalMetadata/Providers/PlaylistXmlProvider.cs
index 36f3048ad..899035652 100644
--- a/MediaBrowser.LocalMetadata/Providers/PlaylistXmlProvider.cs
+++ b/MediaBrowser.LocalMetadata/Providers/PlaylistXmlProvider.cs
@@ -39,7 +39,7 @@ namespace MediaBrowser.LocalMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
         {
             return directoryService.GetFile(PlaylistXmlSaver.GetSavePath(info.Path));
         }
diff --git a/MediaBrowser.Providers/Manager/ProviderManager.cs b/MediaBrowser.Providers/Manager/ProviderManager.cs
index 08c92e15a..dd497845d 100644
--- a/MediaBrowser.Providers/Manager/ProviderManager.cs
+++ b/MediaBrowser.Providers/Manager/ProviderManager.cs
@@ -167,7 +167,7 @@ namespace MediaBrowser.Providers.Manager
                 throw new HttpRequestException("Invalid image received.", null, response.StatusCode);
             }
 
-            var contentType = response.Content.Headers.ContentType.MediaType;
+            var contentType = response.Content.Headers.ContentType?.MediaType;
 
             // Workaround for tvheadend channel icons
             // TODO: Isolate this hack into the tvh plugin
diff --git a/MediaBrowser.Providers/Studios/StudiosImageProvider.cs b/MediaBrowser.Providers/Studios/StudiosImageProvider.cs
index 5fcf6d9aa..5ec9a02cb 100644
--- a/MediaBrowser.Providers/Studios/StudiosImageProvider.cs
+++ b/MediaBrowser.Providers/Studios/StudiosImageProvider.cs
@@ -8,6 +8,7 @@ using System.Linq;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
+using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
@@ -177,13 +178,11 @@ namespace MediaBrowser.Providers.Studios
                 {
                     var lines = new List<string>();
 
-                    while (!reader.EndOfStream)
+                    foreach (var line in reader.ReadAllLines())
                     {
-                        var text = reader.ReadLine();
-
-                        if (!string.IsNullOrWhiteSpace(text))
+                        if (!string.IsNullOrWhiteSpace(line))
                         {
-                            lines.Add(text);
+                            lines.Add(line);
                         }
                     }
 
diff --git a/MediaBrowser.XbmcMetadata/Providers/AlbumNfoProvider.cs b/MediaBrowser.XbmcMetadata/Providers/AlbumNfoProvider.cs
index bd557d783..f7a85a07e 100644
--- a/MediaBrowser.XbmcMetadata/Providers/AlbumNfoProvider.cs
+++ b/MediaBrowser.XbmcMetadata/Providers/AlbumNfoProvider.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.XbmcMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
             => directoryService.GetFile(Path.Combine(info.Path, "album.nfo"));
     }
 }
diff --git a/MediaBrowser.XbmcMetadata/Providers/ArtistNfoProvider.cs b/MediaBrowser.XbmcMetadata/Providers/ArtistNfoProvider.cs
index 54bb83114..2b563b7fa 100644
--- a/MediaBrowser.XbmcMetadata/Providers/ArtistNfoProvider.cs
+++ b/MediaBrowser.XbmcMetadata/Providers/ArtistNfoProvider.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.XbmcMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
             => directoryService.GetFile(Path.Combine(info.Path, "artist.nfo"));
     }
 }
diff --git a/MediaBrowser.XbmcMetadata/Providers/EpisodeNfoProvider.cs b/MediaBrowser.XbmcMetadata/Providers/EpisodeNfoProvider.cs
index 64b208345..f6c5877b4 100644
--- a/MediaBrowser.XbmcMetadata/Providers/EpisodeNfoProvider.cs
+++ b/MediaBrowser.XbmcMetadata/Providers/EpisodeNfoProvider.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.XbmcMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
         {
             var path = Path.ChangeExtension(info.Path, ".nfo");
 
diff --git a/MediaBrowser.XbmcMetadata/Providers/SeasonNfoProvider.cs b/MediaBrowser.XbmcMetadata/Providers/SeasonNfoProvider.cs
index 97220cf7e..d01abadf6 100644
--- a/MediaBrowser.XbmcMetadata/Providers/SeasonNfoProvider.cs
+++ b/MediaBrowser.XbmcMetadata/Providers/SeasonNfoProvider.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.XbmcMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
             => directoryService.GetFile(Path.Combine(info.Path, "season.nfo"));
     }
 }
diff --git a/MediaBrowser.XbmcMetadata/Providers/SeriesNfoProvider.cs b/MediaBrowser.XbmcMetadata/Providers/SeriesNfoProvider.cs
index 9a9b94123..002b94463 100644
--- a/MediaBrowser.XbmcMetadata/Providers/SeriesNfoProvider.cs
+++ b/MediaBrowser.XbmcMetadata/Providers/SeriesNfoProvider.cs
@@ -57,7 +57,7 @@ namespace MediaBrowser.XbmcMetadata.Providers
         }
 
         /// <inheritdoc />
-        protected override FileSystemMetadata GetXmlFile(ItemInfo info, IDirectoryService directoryService)
+        protected override FileSystemMetadata? GetXmlFile(ItemInfo info, IDirectoryService directoryService)
             => directoryService.GetFile(Path.Combine(info.Path, "tvshow.nfo"));
     }
 }