2 files changed, 21 insertions, 38 deletions

diff --git a/Emby.Server.Implementations/Channels/ChannelManager.cs b/Emby.Server.Implementations/Channels/ChannelManager.cs
index 949b89226..7e50650d7 100644
--- a/Emby.Server.Implementations/Channels/ChannelManager.cs
+++ b/Emby.Server.Implementations/Channels/ChannelManager.cs
@@ -243,8 +243,7 @@ namespace Emby.Server.Implementations.Channels
             {
                 foreach (var item in returnItems)
                 {
-                    var task = RefreshLatestChannelItems(GetChannelProvider(item), CancellationToken.None);
-                    Task.WaitAll(task);
+                    RefreshLatestChannelItems(GetChannelProvider(item), CancellationToken.None).GetAwaiter().GetResult();
                 }
             }
 
@@ -303,9 +302,7 @@ namespace Emby.Server.Implementations.Channels
                 }
 
                 numComplete++;
-                double percent = numComplete;
-                percent /= allChannelsList.Count;
-
+                double percent = (double)numComplete / allChannelsList.Count;
                 progress.Report(100 * percent);
             }
 
@@ -658,9 +655,7 @@ namespace Emby.Server.Implementations.Channels
 
             foreach (var item in result.Items)
             {
-                var folder = item as Folder;
-
-                if (folder != null)
+                if (item is Folder folder)
                 {
                     await GetChannelItemsInternal(new InternalItemsQuery
                     {
diff --git a/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs b/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
index ad6c537ef..3c7cbb115 100644
--- a/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
+++ b/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
@@ -35,64 +35,52 @@ namespace Emby.Server.Implementations.Channels
         public static string GetUserDistinctValue(User user)
         {
             var channels = user.Policy.EnabledChannels
-                .OrderBy(i => i)
-                .ToList();
+                .OrderBy(i => i);
 
-            return string.Join("|", channels.ToArray());
+            return string.Join("|", channels);
         }
 
         private void CleanDatabase(CancellationToken cancellationToken)
         {
             var installedChannelIds = ((ChannelManager)_channelManager).GetInstalledChannelIds();
 
-            var databaseIds = _libraryManager.GetItemIds(new InternalItemsQuery
+            var uninstalledChannels = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { typeof(Channel).Name }
+                IncludeItemTypes = new[] { typeof(Channel).Name },
+                ExcludeItemIds = installedChannelIds.ToArray()
             });
 
-            var invalidIds = databaseIds
-                .Except(installedChannelIds)
-                .ToList();
-
-            foreach (var id in invalidIds)
+            foreach (var channel in uninstalledChannels)
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
-                CleanChannel(id, cancellationToken);
+                CleanChannel((Channel)channel, cancellationToken);
             }
         }
 
-        private void CleanChannel(Guid id, CancellationToken cancellationToken)
+        private void CleanChannel(Channel channel, CancellationToken cancellationToken)
         {
-            _logger.LogInformation("Cleaning channel {0} from database", id);
+            _logger.LogInformation("Cleaning channel {0} from database", channel.Id);
 
             // Delete all channel items
-            var allIds = _libraryManager.GetItemIds(new InternalItemsQuery
+            var items = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                ChannelIds = new[] { id }
+                ChannelIds = new[] { channel.Id }
             });
 
-            foreach (var deleteId in allIds)
+            foreach (var item in items)
             {
                 cancellationToken.ThrowIfCancellationRequested();
 
-                DeleteItem(deleteId);
-            }
-
-            // Finally, delete the channel itself
-            DeleteItem(id);
-        }
+                _libraryManager.DeleteItem(item, new DeleteOptions
+                {
+                    DeleteFileLocation = false
 
-        private void DeleteItem(Guid id)
-        {
-            var item = _libraryManager.GetItemById(id);
-
-            if (item == null)
-            {
-                return;
+                }, false);
             }
 
-            _libraryManager.DeleteItem(item, new DeleteOptions
+            // Finally, delete the channel itself
+            _libraryManager.DeleteItem(channel, new DeleteOptions
             {
                 DeleteFileLocation = false