Replace != null with is not null

27 files changed, 114 insertions, 114 deletions

diff --git a/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs b/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
index b0e394dc5a..ed7c2c2c17 100644
--- a/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
+++ b/MediaBrowser.Controller/BaseItemManager/BaseItemManager.cs
@@ -49,7 +49,7 @@ namespace MediaBrowser.Controller.BaseItemManager
                 return !baseItem.EnableMediaSourceDisplay;
             }
 
-            if (libraryTypeOptions != null)
+            if (libraryTypeOptions is not null)
             {
                 return libraryTypeOptions.MetadataFetchers.Contains(name.AsSpan(), StringComparison.OrdinalIgnoreCase);
             }
@@ -74,7 +74,7 @@ namespace MediaBrowser.Controller.BaseItemManager
                 return !baseItem.EnableMediaSourceDisplay;
             }
 
-            if (libraryTypeOptions != null)
+            if (libraryTypeOptions is not null)
             {
                 return libraryTypeOptions.ImageFetchers.Contains(name.AsSpan(), StringComparison.OrdinalIgnoreCase);
             }
diff --git a/MediaBrowser.Controller/Entities/AggregateFolder.cs b/MediaBrowser.Controller/Entities/AggregateFolder.cs
index 4dc78ff86b..08c622cde0 100644
--- a/MediaBrowser.Controller/Entities/AggregateFolder.cs
+++ b/MediaBrowser.Controller/Entities/AggregateFolder.cs
@@ -74,7 +74,7 @@ namespace MediaBrowser.Controller.Entities
                     return list;
                 }
 
-                return _childrenIds.Select(LibraryManager.GetItemById).Where(i => i != null).ToList();
+                return _childrenIds.Select(LibraryManager.GetItemById).Where(i => i is not null).ToList();
             }
         }
 
diff --git a/MediaBrowser.Controller/Entities/Audio/Audio.cs b/MediaBrowser.Controller/Entities/Audio/Audio.cs
index 29f7bf92b7..c7216a3209 100644
--- a/MediaBrowser.Controller/Entities/Audio/Audio.cs
+++ b/MediaBrowser.Controller/Entities/Audio/Audio.cs
@@ -81,8 +81,8 @@ namespace MediaBrowser.Controller.Entities.Audio
         /// <returns>System.String.</returns>
         protected override string CreateSortName()
         {
-            return (ParentIndexNumber != null ? ParentIndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty)
-                    + (IndexNumber != null ? IndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty) + Name;
+            return (ParentIndexNumber is not null ? ParentIndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty)
+                    + (IndexNumber is not null ? IndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty) + Name;
         }
 
         public override List<string> GetUserDataKeys()
diff --git a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
index 6555de8554..2dbd513a17 100644
--- a/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
+++ b/MediaBrowser.Controller/Entities/Audio/MusicAlbum.cs
@@ -138,7 +138,7 @@ namespace MediaBrowser.Controller.Entities.Audio
 
             var artist = GetMusicArtist(new DtoOptions(false));
 
-            if (artist != null)
+            if (artist is not null)
             {
                 id.ArtistProviderIds = artist.ProviderIds;
             }
diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs
index 20f0095880..b7934bc098 100644
--- a/MediaBrowser.Controller/Entities/BaseItem.cs
+++ b/MediaBrowser.Controller/Entities/BaseItem.cs
@@ -658,7 +658,7 @@ namespace MediaBrowser.Controller.Entities
                 }
 
                 var parent = DisplayParent;
-                if (parent != null)
+                if (parent is not null)
                 {
                     return parent.OfficialRatingForComparison;
                 }
@@ -679,7 +679,7 @@ namespace MediaBrowser.Controller.Entities
                 }
 
                 var parent = DisplayParent;
-                if (parent != null)
+                if (parent is not null)
                 {
                     return parent.CustomRatingForComparison;
                 }
@@ -976,7 +976,7 @@ namespace MediaBrowser.Controller.Entities
         {
             var parent = GetParent();
 
-            while (parent != null)
+            while (parent is not null)
             {
                 yield return parent;
 
@@ -1114,7 +1114,7 @@ namespace MediaBrowser.Controller.Entities
             }
 
             var video = item as Video;
-            if (video != null)
+            if (video is not null)
             {
                 info.IsoType = video.IsoType;
                 info.VideoType = video.VideoType;
@@ -1153,7 +1153,7 @@ namespace MediaBrowser.Controller.Entities
                 info.SupportsDirectStream = MediaSourceManager.SupportsDirectStream(info.Path, info.Protocol);
             }
 
-            if (video != null && video.VideoType != VideoType.VideoFile)
+            if (video is not null && video.VideoType != VideoType.VideoFile)
             {
                 info.SupportsDirectStream = false;
             }
@@ -1692,7 +1692,7 @@ namespace MediaBrowser.Controller.Entities
 
                 var itemById = LibraryManager.GetItemById(info.ItemId.Value);
 
-                if (itemById != null)
+                if (itemById is not null)
                 {
                     return itemById;
                 }
@@ -2060,7 +2060,7 @@ namespace MediaBrowser.Controller.Entities
             {
                 var artist = FindParent<MusicArtist>();
 
-                if (artist != null)
+                if (artist is not null)
                 {
                     return artist.GetImages(imageType).ElementAtOrDefault(imageIndex);
                 }
@@ -2274,14 +2274,14 @@ namespace MediaBrowser.Controller.Entities
         {
             var userdata = UserDataManager.GetUserData(user, this);
 
-            return userdata != null && userdata.Played;
+            return userdata is not null && userdata.Played;
         }
 
         public bool IsFavoriteOrLiked(User user)
         {
             var userdata = UserDataManager.GetUserData(user, this);
 
-            return userdata != null && (userdata.IsFavorite || (userdata.Likes ?? false));
+            return userdata is not null && (userdata.IsFavorite || (userdata.Likes ?? false));
         }
 
         public virtual bool IsUnplayed(User user)
@@ -2565,7 +2565,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return ExtraIds
                 .Select(LibraryManager.GetItemById)
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .OrderBy(i => i.SortName);
         }
 
@@ -2578,7 +2578,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return ExtraIds
                 .Select(LibraryManager.GetItemById)
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .Where(i => i.ExtraType.HasValue && extraTypes.Contains(i.ExtraType.Value))
                 .OrderBy(i => i.SortName);
         }
diff --git a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
index dc06bf9bda..615d236c73 100644
--- a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
+++ b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
@@ -95,7 +95,7 @@ namespace MediaBrowser.Controller.Entities
                 }
 
                 var p = destProps.Find(x => x.Name == sourceProp.Name);
-                if (p != null)
+                if (p is not null)
                 {
                     p.SetValue(dest, v);
                 }
diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index 9ef5504afb..e586205c32 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -483,7 +483,7 @@ namespace MediaBrowser.Controller.Entities
                     }
                 });
 
-                if (container != null)
+                if (container is not null)
                 {
                     await RefreshAllMetadataForContainer(container, refreshOptions, innerProgress, cancellationToken).ConfigureAwait(false);
                 }
@@ -515,7 +515,7 @@ namespace MediaBrowser.Controller.Entities
                 async () =>
                 {
                     var series = container as Series;
-                    if (series != null)
+                    if (series is not null)
                     {
                         await series.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);
                     }
@@ -529,7 +529,7 @@ namespace MediaBrowser.Controller.Entities
         {
             var container = child as IMetadataContainer;
 
-            if (container != null)
+            if (container is not null)
             {
                 await RefreshAllMetadataForContainer(container, refreshOptions, progress, cancellationToken).ConfigureAwait(false);
             }
@@ -741,7 +741,7 @@ namespace MediaBrowser.Controller.Entities
             IEnumerable<BaseItem> itemsList = LibraryManager.GetItemList(query);
             var user = query.User;
 
-            if (user != null)
+            if (user is not null)
             {
                 // needed for boxsets
                 itemsList = itemsList.Where(i => i.IsVisibleStandalone(query.User));
@@ -984,7 +984,7 @@ namespace MediaBrowser.Controller.Entities
             var user = query.User;
 
             // Check recursive - don't substitute in plain folder views
-            if (user != null)
+            if (user is not null)
             {
                 items = CollapseBoxSetItemsIfNeeded(items, query, this, user, ConfigurationManager, CollectionManager);
             }
@@ -1069,7 +1069,7 @@ namespace MediaBrowser.Controller.Entities
 
             if (!param.HasValue)
             {
-                if (user != null && !configurationManager.Configuration.EnableGroupingIntoCollections)
+                if (user is not null && !configurationManager.Configuration.EnableGroupingIntoCollections)
                 {
                     return false;
                 }
@@ -1441,7 +1441,7 @@ namespace MediaBrowser.Controller.Entities
             {
                 var child = GetLinkedChild(i);
 
-                if (child != null)
+                if (child is not null)
                 {
                     list.Add(child);
                 }
@@ -1467,7 +1467,7 @@ namespace MediaBrowser.Controller.Entities
 
                 var child = GetLinkedChild(i);
 
-                if (child != null && child.Id.Equals(itemId))
+                if (child is not null && child.Id.Equals(itemId))
                 {
                     return true;
                 }
@@ -1547,7 +1547,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return LinkedChildren
                 .Select(i => new Tuple<LinkedChild, BaseItem>(i, GetLinkedChild(i)))
-                .Where(i => i.Item2 != null);
+                .Where(i => i.Item2 is not null);
         }
 
         protected override async Task<bool> RefreshedOwnedItems(MetadataRefreshOptions options, IReadOnlyList<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)
@@ -1605,7 +1605,7 @@ namespace MediaBrowser.Controller.Entities
                             return null;
                         }
                     })
-                    .Where(i => i != null)
+                    .Where(i => i is not null)
                     .ToList();
 
                 var currentShortcutLinks = LinkedChildren.Where(i => i.Type == LinkedChildType.Shortcut).ToList();
@@ -1662,7 +1662,7 @@ namespace MediaBrowser.Controller.Entities
                 {
                     // The querying doesn't support virtual unaired
                     var episode = item as Episode;
-                    if (episode != null && episode.IsUnaired)
+                    if (episode is not null && episode.IsUnaired)
                     {
                         continue;
                     }
@@ -1719,7 +1719,7 @@ namespace MediaBrowser.Controller.Entities
                 return;
             }
 
-            if (itemDto != null)
+            if (itemDto is not null)
             {
                 if (fields.ContainsField(ItemFields.RecursiveItemCount))
                 {
diff --git a/MediaBrowser.Controller/Entities/InternalItemsQuery.cs b/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
index fc019c0ee7..a1e5319048 100644
--- a/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
+++ b/MediaBrowser.Controller/Entities/InternalItemsQuery.cs
@@ -55,7 +55,7 @@ namespace MediaBrowser.Controller.Entities
         public InternalItemsQuery(User? user)
             : this()
         {
-            if (user != null)
+            if (user is not null)
             {
                 SetUser(user);
             }
diff --git a/MediaBrowser.Controller/Entities/Movies/Movie.cs b/MediaBrowser.Controller/Entities/Movies/Movie.cs
index 3c12acd90d..81f6248fac 100644
--- a/MediaBrowser.Controller/Entities/Movies/Movie.cs
+++ b/MediaBrowser.Controller/Entities/Movies/Movie.cs
@@ -22,7 +22,7 @@ namespace MediaBrowser.Controller.Entities.Movies
         /// <inheritdoc />
         [JsonIgnore]
         public IReadOnlyList<Guid> SpecialFeatureIds => GetExtras()
-            .Where(extra => extra.ExtraType != null && extra is Video)
+            .Where(extra => extra.ExtraType is not null && extra is Video)
             .Select(extra => extra.Id)
             .ToArray();
 
diff --git a/MediaBrowser.Controller/Entities/PeopleHelper.cs b/MediaBrowser.Controller/Entities/PeopleHelper.cs
index 46d969ffe4..44c0e25396 100644
--- a/MediaBrowser.Controller/Entities/PeopleHelper.cs
+++ b/MediaBrowser.Controller/Entities/PeopleHelper.cs
@@ -41,7 +41,7 @@ namespace MediaBrowser.Controller.Entities
             {
                 var existing = people.FirstOrDefault(p => p.Name.Equals(person.Name, StringComparison.OrdinalIgnoreCase) && p.Type.Equals(PersonType.Actor, StringComparison.OrdinalIgnoreCase));
 
-                if (existing != null)
+                if (existing is not null)
                 {
                     existing.Type = PersonType.GuestStar;
                     MergeExisting(existing, person);
diff --git a/MediaBrowser.Controller/Entities/TV/Episode.cs b/MediaBrowser.Controller/Entities/TV/Episode.cs
index 2d9cdb8d04..3f30ac5658 100644
--- a/MediaBrowser.Controller/Entities/TV/Episode.cs
+++ b/MediaBrowser.Controller/Entities/TV/Episode.cs
@@ -155,7 +155,7 @@ namespace MediaBrowser.Controller.Entities.TV
             var list = base.GetUserDataKeys();
 
             var series = Series;
-            if (series != null && ParentIndexNumber.HasValue && IndexNumber.HasValue)
+            if (series is not null && ParentIndexNumber.HasValue && IndexNumber.HasValue)
             {
                 var seriesUserDataKeys = series.GetUserDataKeys();
                 var take = seriesUserDataKeys.Count;
@@ -216,7 +216,7 @@ namespace MediaBrowser.Controller.Entities.TV
             {
                 var series = Series;
 
-                if (series != null && ParentIndexNumber.HasValue)
+                if (series is not null && ParentIndexNumber.HasValue)
                 {
                     var findNumber = ParentIndexNumber.Value;
 
@@ -235,8 +235,8 @@ namespace MediaBrowser.Controller.Entities.TV
         /// <returns>System.String.</returns>
         protected override string CreateSortName()
         {
-            return (ParentIndexNumber != null ? ParentIndexNumber.Value.ToString("000 - ", CultureInfo.InvariantCulture) : string.Empty)
-                    + (IndexNumber != null ? IndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty) + Name;
+            return (ParentIndexNumber is not null ? ParentIndexNumber.Value.ToString("000 - ", CultureInfo.InvariantCulture) : string.Empty)
+                    + (IndexNumber is not null ? IndexNumber.Value.ToString("0000 - ", CultureInfo.InvariantCulture) : string.Empty) + Name;
         }
 
         /// <summary>
@@ -302,7 +302,7 @@ namespace MediaBrowser.Controller.Entities.TV
 
             var series = Series;
 
-            if (series != null)
+            if (series is not null)
             {
                 id.SeriesProviderIds = series.ProviderIds;
                 id.SeriesDisplayOrder = series.DisplayOrder;
diff --git a/MediaBrowser.Controller/Entities/TV/Season.cs b/MediaBrowser.Controller/Entities/TV/Season.cs
index 19fe16c8f1..0a040a3c28 100644
--- a/MediaBrowser.Controller/Entities/TV/Season.cs
+++ b/MediaBrowser.Controller/Entities/TV/Season.cs
@@ -64,7 +64,7 @@ namespace MediaBrowser.Controller.Entities.TV
             {
                 var series = Series;
 
-                if (series != null)
+                if (series is not null)
                 {
                     return series.Path;
                 }
@@ -101,7 +101,7 @@ namespace MediaBrowser.Controller.Entities.TV
             var list = base.GetUserDataKeys();
 
             var series = Series;
-            if (series != null)
+            if (series is not null)
             {
                 var newList = series.GetUserDataKeys();
                 var suffix = (IndexNumber ?? 0).ToString("000", CultureInfo.InvariantCulture);
@@ -129,7 +129,7 @@ namespace MediaBrowser.Controller.Entities.TV
             if (IndexNumber.HasValue)
             {
                 var series = Series;
-                if (series != null)
+                if (series is not null)
                 {
                     return series.PresentationUniqueKey + "-" + (IndexNumber ?? 0).ToString("000", CultureInfo.InvariantCulture);
                 }
@@ -144,7 +144,7 @@ namespace MediaBrowser.Controller.Entities.TV
         /// <returns>System.String.</returns>
         protected override string CreateSortName()
         {
-            return IndexNumber != null ? IndexNumber.Value.ToString("0000", CultureInfo.InvariantCulture) : Name;
+            return IndexNumber is not null ? IndexNumber.Value.ToString("0000", CultureInfo.InvariantCulture) : Name;
         }
 
         protected override QueryResult<BaseItem> GetItemsInternal(InternalItemsQuery query)
@@ -233,7 +233,7 @@ namespace MediaBrowser.Controller.Entities.TV
 
             var series = Series;
 
-            if (series != null)
+            if (series is not null)
             {
                 id.SeriesProviderIds = series.ProviderIds;
             }
diff --git a/MediaBrowser.Controller/Entities/TV/Series.cs b/MediaBrowser.Controller/Entities/TV/Series.cs
index 069071ee57..02312757ce 100644
--- a/MediaBrowser.Controller/Entities/TV/Series.cs
+++ b/MediaBrowser.Controller/Entities/TV/Series.cs
@@ -218,7 +218,7 @@ namespace MediaBrowser.Controller.Entities.TV
             query.IncludeItemTypes = new[] { BaseItemKind.Season };
             query.OrderBy = new[] { (ItemSortBy.SortName, SortOrder.Ascending) };
 
-            if (user != null && !user.DisplayMissingEpisodes)
+            if (user is not null && !user.DisplayMissingEpisodes)
             {
                 query.IsMissing = false;
             }
@@ -369,7 +369,7 @@ namespace MediaBrowser.Controller.Entities.TV
                 OrderBy = new[] { (ItemSortBy.SortName, SortOrder.Ascending) },
                 DtoOptions = options
             };
-            if (user != null)
+            if (user is not null)
             {
                 if (!user.DisplayMissingEpisodes)
                 {
@@ -426,7 +426,7 @@ namespace MediaBrowser.Controller.Entities.TV
                 }
 
                 var season = episodeItem.Season;
-                return season != null && string.Equals(GetUniqueSeriesKey(season), seasonPresentationKey, StringComparison.OrdinalIgnoreCase);
+                return season is not null && string.Equals(GetUniqueSeriesKey(season), seasonPresentationKey, StringComparison.OrdinalIgnoreCase);
             });
         }
 
@@ -448,7 +448,7 @@ namespace MediaBrowser.Controller.Entities.TV
             {
                 var episode = i;
 
-                if (episode != null)
+                if (episode is not null)
                 {
                     var currentSeasonNumber = episode.AiredSeasonNumber;
 
diff --git a/MediaBrowser.Controller/Entities/UserItemData.cs b/MediaBrowser.Controller/Entities/UserItemData.cs
index 50ba9ef308..ecca440f05 100644
--- a/MediaBrowser.Controller/Entities/UserItemData.cs
+++ b/MediaBrowser.Controller/Entities/UserItemData.cs
@@ -105,7 +105,7 @@ namespace MediaBrowser.Controller.Entities
         {
             get
             {
-                if (Rating != null)
+                if (Rating is not null)
                 {
                     return Rating >= MinLikeValue;
                 }
diff --git a/MediaBrowser.Controller/Entities/UserRootFolder.cs b/MediaBrowser.Controller/Entities/UserRootFolder.cs
index b19b1fa13b..69743b926c 100644
--- a/MediaBrowser.Controller/Entities/UserRootFolder.cs
+++ b/MediaBrowser.Controller/Entities/UserRootFolder.cs
@@ -63,7 +63,7 @@ namespace MediaBrowser.Controller.Entities
                     return list;
                 }
 
-                return _childrenIds.Select(LibraryManager.GetItemById).Where(i => i != null).ToList();
+                return _childrenIds.Select(LibraryManager.GetItemById).Where(i => i is not null).ToList();
             }
         }
 
diff --git a/MediaBrowser.Controller/Entities/UserViewBuilder.cs b/MediaBrowser.Controller/Entities/UserViewBuilder.cs
index 7ebf9e5f8b..c276ab463a 100644
--- a/MediaBrowser.Controller/Entities/UserViewBuilder.cs
+++ b/MediaBrowser.Controller/Entities/UserViewBuilder.cs
@@ -46,7 +46,7 @@ namespace MediaBrowser.Controller.Entities
         {
             var user = query.User;
 
-            // if (query.IncludeItemTypes != null &&
+            // if (query.IncludeItemTypes is not null &&
             //    query.IncludeItemTypes.Length == 1 &&
             //    string.Equals(query.IncludeItemTypes[0], "Playlist", StringComparison.OrdinalIgnoreCase))
             // {
@@ -263,7 +263,7 @@ namespace MediaBrowser.Controller.Entities
                         return null;
                     }
                 })
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .Select(i => GetUserViewWithName(SpecialFolder.MovieGenre, i.SortName, parent));
 
             return GetResult(genres, query);
@@ -391,7 +391,7 @@ namespace MediaBrowser.Controller.Entities
                         return null;
                     }
                 })
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .Select(i => GetUserViewWithName(SpecialFolder.TvGenre, i.SortName, parent));
 
             return GetResult(genres, query);
@@ -791,7 +791,7 @@ namespace MediaBrowser.Controller.Entities
             if (query.StudioIds.Length > 0 && !query.StudioIds.Any(id =>
             {
                 var studioItem = libraryManager.GetItemById(id);
-                return studioItem != null && item.Studios.Contains(studioItem.Name, StringComparison.OrdinalIgnoreCase);
+                return studioItem is not null && item.Studios.Contains(studioItem.Name, StringComparison.OrdinalIgnoreCase);
             }))
             {
                 return false;
@@ -801,7 +801,7 @@ namespace MediaBrowser.Controller.Entities
             if (query.GenreIds.Count > 0 && !query.GenreIds.Any(id =>
             {
                 var genreItem = libraryManager.GetItemById(id);
-                return genreItem != null && item.Genres.Contains(genreItem.Name, StringComparison.OrdinalIgnoreCase);
+                return genreItem is not null && item.Genres.Contains(genreItem.Name, StringComparison.OrdinalIgnoreCase);
             }))
             {
                 return false;
@@ -952,7 +952,7 @@ namespace MediaBrowser.Controller.Entities
                     {
                         var folder = i as ICollectionFolder;
 
-                        return folder != null && viewTypes.Contains(folder.CollectionType ?? string.Empty, StringComparison.OrdinalIgnoreCase);
+                        return folder is not null && viewTypes.Contains(folder.CollectionType ?? string.Empty, StringComparison.OrdinalIgnoreCase);
                     }).ToArray();
             }
 
@@ -961,7 +961,7 @@ namespace MediaBrowser.Controller.Entities
                 {
                     var folder = i as ICollectionFolder;
 
-                    return folder != null && viewTypes.Contains(folder.CollectionType ?? string.Empty, StringComparison.OrdinalIgnoreCase);
+                    return folder is not null && viewTypes.Contains(folder.CollectionType ?? string.Empty, StringComparison.OrdinalIgnoreCase);
                 }).ToArray();
         }
 
diff --git a/MediaBrowser.Controller/Entities/Video.cs b/MediaBrowser.Controller/Entities/Video.cs
index 5de2e0f50e..5b7abea10a 100644
--- a/MediaBrowser.Controller/Entities/Video.cs
+++ b/MediaBrowser.Controller/Entities/Video.cs
@@ -373,7 +373,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return LinkedAlternateVersions
                 .Select(GetLinkedChild)
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .OfType<Video>()
                 .OrderBy(i => i.SortName);
         }
@@ -386,7 +386,7 @@ namespace MediaBrowser.Controller.Entities
         {
             return GetAdditionalPartIds()
                 .Select(i => LibraryManager.GetItemById(i))
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .OfType<Video>()
                 .OrderBy(i => i.SortName);
         }
@@ -469,7 +469,7 @@ namespace MediaBrowser.Controller.Entities
 
             var localAlternates = GetLocalAlternateVersionIds()
                 .Select(i => LibraryManager.GetItemById(i))
-                .Where(i => i != null);
+                .Where(i => i is not null);
 
             foreach (var item in localAlternates)
             {
@@ -542,7 +542,7 @@ namespace MediaBrowser.Controller.Entities
                     return i.Item1 is Video video ? video.GetLocalAlternateVersionIds() : Enumerable.Empty<Guid>();
                 })
                 .Select(LibraryManager.GetItemById)
-                .Where(i => i != null)
+                .Where(i => i is not null)
                 .ToList();
 
             list.AddRange(localAlternates.Select(i => (i, MediaSourceType.Default)));
diff --git a/MediaBrowser.Controller/Library/ItemResolveArgs.cs b/MediaBrowser.Controller/Library/ItemResolveArgs.cs
index f93c890fee..0424399c8e 100644
--- a/MediaBrowser.Controller/Library/ItemResolveArgs.cs
+++ b/MediaBrowser.Controller/Library/ItemResolveArgs.cs
@@ -130,7 +130,7 @@ namespace MediaBrowser.Controller.Library
         {
             var parent = Parent;
 
-            if (parent != null)
+            if (parent is not null)
             {
                 var item = parent as T;
 
@@ -148,7 +148,7 @@ namespace MediaBrowser.Controller.Library
                     }
                 }
 
-                return item != null;
+                return item is not null;
             }
 
             return false;
@@ -287,14 +287,14 @@ namespace MediaBrowser.Controller.Library
         /// <returns><c>true</c> if the arguments are the same, <c>false</c> otherwise.</returns>
         protected bool Equals(ItemResolveArgs args)
         {
-            if (args != null)
+            if (args is not null)
             {
                 if (args.Path is null && Path is null)
                 {
                     return true;
                 }
 
-                return args.Path != null && BaseItem.FileSystem.AreEqual(args.Path, Path);
+                return args.Path is not null && BaseItem.FileSystem.AreEqual(args.Path, Path);
             }
 
             return false;
diff --git a/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs b/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
index 6c4a5ea177..514323238e 100644
--- a/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
+++ b/MediaBrowser.Controller/LiveTv/LiveTvProgram.cs
@@ -246,7 +246,7 @@ namespace MediaBrowser.Controller.LiveTv
 
             var listings = GetListingsProviderInfo();
 
-            if (listings != null)
+            if (listings is not null)
             {
                 if (!string.IsNullOrEmpty(listings.MoviePrefix) && name.StartsWith(listings.MoviePrefix, StringComparison.OrdinalIgnoreCase))
                 {
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index d423a2fbe4..7264c5eed0 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -682,7 +682,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
         public string GetGraphicalSubCanvasSize(EncodingJobInfo state)
         {
-            if (state.SubtitleStream != null
+            if (state.SubtitleStream is not null
                 && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode
                 && !state.SubtitleStream.IsTextSubtitleStream)
             {
@@ -932,7 +932,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 .Append(GetInputPathArgument(state));
 
             // sub2video for external graphical subtitles
-            if (state.SubtitleStream != null
+            if (state.SubtitleStream is not null
                 && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode
                 && !state.SubtitleStream.IsTextSubtitleStream
                 && state.SubtitleStream.IsExternal)
@@ -963,7 +963,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 arg.Append(" -i file:\"").Append(subtitlePath).Append('\"');
             }
 
-            if (state.AudioStream != null && state.AudioStream.IsExternal)
+            if (state.AudioStream is not null && state.AudioStream.IsExternal)
             {
                 // Also seek the external audio stream.
                 var seekAudioParam = GetFastSeekCommandLineParameter(state, options, segmentContainer);
@@ -1231,7 +1231,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             var maxrate = request.MaxFramerate;
 
-            if (maxrate.HasValue && state.VideoStream != null)
+            if (maxrate.HasValue && state.VideoStream is not null)
             {
                 var contentRate = state.VideoStream.AverageFrameRate ?? state.VideoStream.RealFrameRate;
 
@@ -1981,7 +1981,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         {
             var bitrate = request.VideoBitRate;
 
-            if (videoStream != null)
+            if (videoStream is not null)
             {
                 var isUpscaling = request.Height.HasValue
                     && videoStream.Height.HasValue
@@ -2130,7 +2130,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             // Boost volume to 200% when downsampling from 6ch to 2ch
             if (channels.HasValue
                 && channels.Value <= 2
-                && state.AudioStream != null
+                && state.AudioStream is not null
                 && state.AudioStream.Channels.HasValue
                 && state.AudioStream.Channels.Value > 5
                 && !encodingOptions.DownMixAudioBoost.Equals(1))
@@ -2139,7 +2139,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             }
 
             var isCopyingTimestamps = state.CopyTimestamps || state.TranscodingType != TranscodingJobType.Progressive;
-            if (state.SubtitleStream != null && state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode && !isCopyingTimestamps)
+            if (state.SubtitleStream is not null && state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode && !isCopyingTimestamps)
             {
                 var seconds = TimeSpan.FromTicks(state.StartTimeTicks ?? 0).TotalSeconds;
 
@@ -2326,20 +2326,20 @@ namespace MediaBrowser.Controller.MediaEncoding
             }
 
             // We have media info, but we don't know the stream index
-            if (state.VideoStream != null && state.VideoStream.Index == -1)
+            if (state.VideoStream is not null && state.VideoStream.Index == -1)
             {
                 return "-sn";
             }
 
             // We have media info, but we don't know the stream index
-            if (state.AudioStream != null && state.AudioStream.Index == -1)
+            if (state.AudioStream is not null && state.AudioStream.Index == -1)
             {
                 return state.IsInputVideo ? "-sn" : string.Empty;
             }
 
             var args = string.Empty;
 
-            if (state.VideoStream != null)
+            if (state.VideoStream is not null)
             {
                 int videoStreamIndex = FindIndex(state.MediaSource.MediaStreams, state.VideoStream);
 
@@ -2354,12 +2354,12 @@ namespace MediaBrowser.Controller.MediaEncoding
                 args += "-vn";
             }
 
-            if (state.AudioStream != null)
+            if (state.AudioStream is not null)
             {
                 int audioStreamIndex = FindIndex(state.MediaSource.MediaStreams, state.AudioStream);
                 if (state.AudioStream.IsExternal)
                 {
-                    bool hasExternalGraphicsSubs = state.SubtitleStream != null
+                    bool hasExternalGraphicsSubs = state.SubtitleStream is not null
                         && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode
                         && state.SubtitleStream.IsExternal
                         && !state.SubtitleStream.IsTextSubtitleStream;
@@ -2427,7 +2427,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             {
                 var stream = streams.FirstOrDefault(s => s.Index == desiredIndex.Value);
 
-                if (stream != null)
+                if (stream is not null)
                 {
                     return stream;
                 }
@@ -2875,7 +2875,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doDeintHevc = state.DeInterlace("h265", true) || state.DeInterlace("hevc", true);
             var doDeintH2645 = doDeintH264 || doDeintHevc;
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
 
@@ -2990,7 +2990,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doDeintH2645 = doDeintH264 || doDeintHevc;
             var doCuTonemap = IsHwTonemapAvailable(state, options);
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -3180,7 +3180,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doDeintH2645 = doDeintH264 || doDeintHevc;
             var doOclTonemap = IsHwTonemapAvailable(state, options);
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -3402,7 +3402,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doDeintH2645 = doDeintH264 || doDeintHevc;
             var doOclTonemap = IsHwTonemapAvailable(state, options);
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -3605,7 +3605,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doTonemap = doVaVppTonemap || doOclTonemap;
             var doDeintH2645 = doDeintH264 || doDeintHevc;
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -3882,7 +3882,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doTonemap = doVaVppTonemap || doOclTonemap;
             var doDeintH2645 = doDeintH264 || doDeintHevc;
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -4078,7 +4078,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doVkTonemap = IsVulkanHwTonemapAvailable(state, options);
             var doDeintH2645 = doDeintH264 || doDeintHevc;
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
             var hasAssSubs = hasSubs
@@ -4277,7 +4277,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             var doDeintH2645 = doDeintH264 || doDeintHevc;
             var doOclTonemap = IsHwTonemapAvailable(state, options);
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
 
@@ -4445,7 +4445,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 return string.Empty;
             }
 
-            var hasSubs = state.SubtitleStream != null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+            var hasSubs = state.SubtitleStream is not null && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
             var hasTextSubs = hasSubs && state.SubtitleStream.IsTextSubtitleStream;
             var hasGraphicalSubs = hasSubs && !state.SubtitleStream.IsTextSubtitleStream;
 
@@ -4495,7 +4495,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (overlayFilters?.Count > 0
                 && subFilters?.Count > 0
-                && state.SubtitleStream != null)
+                && state.SubtitleStream is not null)
             {
                 // overlay graphical/text subtitles
                 var subStr = string.Format(
@@ -4582,7 +4582,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         public static int GetVideoColorBitDepth(EncodingJobInfo state)
         {
             var videoStream = state.VideoStream;
-            if (videoStream != null)
+            if (videoStream is not null)
             {
                 if (videoStream.BitDepth.HasValue)
                 {
@@ -5196,7 +5196,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 #nullable disable
         public void TryStreamCopy(EncodingJobInfo state)
         {
-            if (state.VideoStream != null && CanStreamCopyVideo(state, state.VideoStream))
+            if (state.VideoStream is not null && CanStreamCopyVideo(state, state.VideoStream))
             {
                 state.OutputVideoCodec = "copy";
             }
@@ -5205,13 +5205,13 @@ namespace MediaBrowser.Controller.MediaEncoding
                 var user = state.User;
 
                 // If the user doesn't have access to transcoding, then force stream copy, regardless of whether it will be compatible or not
-                if (user != null && !user.HasPermission(PermissionKind.EnableVideoPlaybackTranscoding))
+                if (user is not null && !user.HasPermission(PermissionKind.EnableVideoPlaybackTranscoding))
                 {
                     state.OutputVideoCodec = "copy";
                 }
             }
 
-            if (state.AudioStream != null
+            if (state.AudioStream is not null
                 && CanStreamCopyAudio(state, state.AudioStream, state.SupportedAudioCodecs))
             {
                 state.OutputAudioCodec = "copy";
@@ -5221,7 +5221,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 var user = state.User;
 
                 // If the user doesn't have access to transcoding, then force stream copy, regardless of whether it will be compatible or not
-                if (user != null && !user.HasPermission(PermissionKind.EnableAudioPlaybackTranscoding))
+                if (user is not null && !user.HasPermission(PermissionKind.EnableAudioPlaybackTranscoding))
                 {
                     state.OutputAudioCodec = "copy";
                 }
@@ -5418,7 +5418,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 state.SubtitleDeliveryMethod = videoRequest.SubtitleMethod;
                 state.AudioStream = GetMediaStream(mediaStreams, videoRequest.AudioStreamIndex, MediaStreamType.Audio);
 
-                if (state.SubtitleStream != null && !state.SubtitleStream.IsExternal)
+                if (state.SubtitleStream is not null && !state.SubtitleStream.IsExternal)
                 {
                     state.InternalSubtitleStreamOffset = mediaStreams.Where(i => i.Type == MediaStreamType.Subtitle && !i.IsExternal).ToList().IndexOf(state.SubtitleStream);
                 }
@@ -5436,7 +5436,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             var request = state.BaseRequest;
             var supportedAudioCodecs = state.SupportedAudioCodecs;
-            if (request != null && supportedAudioCodecs != null && supportedAudioCodecs.Length > 0)
+            if (request is not null && supportedAudioCodecs is not null && supportedAudioCodecs.Length > 0)
             {
                 var supportedAudioCodecsList = supportedAudioCodecs.ToList();
 
@@ -5449,7 +5449,7 @@ namespace MediaBrowser.Controller.MediaEncoding
             }
 
             var supportedVideoCodecs = state.SupportedVideoCodecs;
-            if (request != null && supportedVideoCodecs != null && supportedVideoCodecs.Length > 0)
+            if (request is not null && supportedVideoCodecs is not null && supportedVideoCodecs.Length > 0)
             {
                 var supportedVideoCodecsList = supportedVideoCodecs.ToList();
 
@@ -5617,7 +5617,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (IsCopyCodec(videoCodec))
             {
-                if (state.VideoStream != null
+                if (state.VideoStream is not null
                     && string.Equals(state.OutputContainer, "ts", StringComparison.OrdinalIgnoreCase)
                     && !string.Equals(state.VideoStream.NalLengthSize, "0", StringComparison.OrdinalIgnoreCase))
                 {
@@ -5647,7 +5647,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                 args += keyFrameArg;
 
-                var hasGraphicalSubs = state.SubtitleStream != null && !state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
+                var hasGraphicalSubs = state.SubtitleStream is not null && !state.SubtitleStream.IsTextSubtitleStream && state.SubtitleDeliveryMethod == SubtitleDeliveryMethod.Encode;
 
                 var hasCopyTs = false;
 
@@ -5667,7 +5667,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                     args += " -avoid_negative_ts disabled";
 
-                    if (!(state.SubtitleStream != null && state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream))
+                    if (!(state.SubtitleStream is not null && state.SubtitleStream.IsExternal && !state.SubtitleStream.IsTextSubtitleStream))
                     {
                         args += " -start_at_zero";
                     }
@@ -5694,7 +5694,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         public string GetProgressiveVideoAudioArguments(EncodingJobInfo state, EncodingOptions encodingOptions)
         {
             // If the video doesn't have an audio stream, return a default.
-            if (state.AudioStream is null && state.VideoStream != null)
+            if (state.AudioStream is null && state.VideoStream is not null)
             {
                 return string.Empty;
             }
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
index 5d13cb8ed8..179cabc84a 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
@@ -147,7 +147,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         {
             get
             {
-                if (VideoStream != null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
+                if (VideoStream is not null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
                 {
                     var size = new ImageDimensions(VideoStream.Width.Value, VideoStream.Height.Value);
 
@@ -174,7 +174,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         {
             get
             {
-                if (VideoStream != null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
+                if (VideoStream is not null && VideoStream.Width.HasValue && VideoStream.Height.HasValue)
                 {
                     var size = new ImageDimensions(VideoStream.Width.Value, VideoStream.Height.Value);
 
@@ -204,7 +204,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 if (BaseRequest.Static
                     || EncodingHelper.IsCopyCodec(OutputAudioCodec))
                 {
-                    if (AudioStream != null)
+                    if (AudioStream is not null)
                     {
                         return AudioStream.SampleRate;
                     }
@@ -227,7 +227,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 if (BaseRequest.Static
                     || EncodingHelper.IsCopyCodec(OutputAudioCodec))
                 {
-                    if (AudioStream != null)
+                    if (AudioStream is not null)
                     {
                         return AudioStream.BitDepth;
                     }
@@ -556,7 +556,7 @@ namespace MediaBrowser.Controller.MediaEncoding
         public bool DeInterlace(string videoCodec, bool forceDeinterlaceIfSourceIsInterlaced)
         {
             var videoStream = VideoStream;
-            var isInputInterlaced = videoStream != null && videoStream.IsInterlaced;
+            var isInputInterlaced = videoStream is not null && videoStream.IsInterlaced;
 
             if (!isInputInterlaced)
             {
diff --git a/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs b/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
index 2fe3a54723..fc9ea37d1e 100644
--- a/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
+++ b/MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs
@@ -166,7 +166,7 @@ namespace MediaBrowser.Controller.Net
 
                 var data = await GetDataToSend().ConfigureAwait(false);
 
-                if (data != null)
+                if (data is not null)
                 {
                     await connection.SendAsync(
                         new WebSocketMessage<TReturnDataType>
@@ -204,7 +204,7 @@ namespace MediaBrowser.Controller.Net
             {
                 var connection = _activeConnections.FirstOrDefault(c => c.Item1 == message.Connection);
 
-                if (connection != null)
+                if (connection is not null)
                 {
                     DisposeConnection(connection);
                 }
diff --git a/MediaBrowser.Controller/Playlists/Playlist.cs b/MediaBrowser.Controller/Playlists/Playlist.cs
index 7ae9ff7463..e6bcc9ea85 100644
--- a/MediaBrowser.Controller/Playlists/Playlist.cs
+++ b/MediaBrowser.Controller/Playlists/Playlist.cs
@@ -165,7 +165,7 @@ namespace MediaBrowser.Controller.Playlists
 
         public static List<BaseItem> GetPlaylistItems(string playlistMediaType, IEnumerable<BaseItem> inputItems, User user, DtoOptions options)
         {
-            if (user != null)
+            if (user is not null)
             {
                 inputItems = inputItems.Where(i => i.IsVisible(user));
             }
diff --git a/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs b/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
index a38bbaf695..8a37094620 100644
--- a/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
+++ b/MediaBrowser.Controller/Providers/MetadataRefreshOptions.cs
@@ -32,7 +32,7 @@ namespace MediaBrowser.Controller.Providers
             SearchResult = copy.SearchResult;
             RemoveOldMetadata = copy.RemoveOldMetadata;
 
-            if (copy.RefreshPaths != null && copy.RefreshPaths.Length > 0)
+            if (copy.RefreshPaths is not null && copy.RefreshPaths.Length > 0)
             {
                 RefreshPaths ??= Array.Empty<string>();
 
@@ -58,7 +58,7 @@ namespace MediaBrowser.Controller.Providers
 
         public bool RefreshItem(BaseItem item)
         {
-            if (RefreshPaths != null && RefreshPaths.Length > 0)
+            if (RefreshPaths is not null && RefreshPaths.Length > 0)
             {
                 return RefreshPaths.Contains(item.Path ?? string.Empty, StringComparison.OrdinalIgnoreCase);
             }
diff --git a/MediaBrowser.Controller/Resolvers/ItemResolver.cs b/MediaBrowser.Controller/Resolvers/ItemResolver.cs
index e7bf013fa2..a6da8384e8 100644
--- a/MediaBrowser.Controller/Resolvers/ItemResolver.cs
+++ b/MediaBrowser.Controller/Resolvers/ItemResolver.cs
@@ -46,7 +46,7 @@ namespace MediaBrowser.Controller.Resolvers
         {
             var item = Resolve(args);
 
-            if (item != null)
+            if (item is not null)
             {
                 SetInitialItemValues(item, args);
             }
diff --git a/MediaBrowser.Controller/Session/SessionInfo.cs b/MediaBrowser.Controller/Session/SessionInfo.cs
index d30472f224..25bf23d61b 100644
--- a/MediaBrowser.Controller/Session/SessionInfo.cs
+++ b/MediaBrowser.Controller/Session/SessionInfo.cs
@@ -357,7 +357,7 @@ namespace MediaBrowser.Controller.Session
         {
             lock (_progressLock)
             {
-                if (_progressTimer != null)
+                if (_progressTimer is not null)
                 {
                     _progressTimer.Dispose();
                     _progressTimer = null;
diff --git a/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs b/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
index 3a7685f347..ddbfeb8de8 100644
--- a/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
+++ b/MediaBrowser.Controller/SyncPlay/Queue/PlayQueueManager.cs
@@ -180,7 +180,7 @@ namespace MediaBrowser.Controller.SyncPlay.Queue
             _shuffledPlaylist.Clear();
             LastChange = DateTime.UtcNow;
 
-            if (!clearPlayingItem && playingItem != null)
+            if (!clearPlayingItem && playingItem is not null)
             {
                 _sortedPlaylist.Add(playingItem);
                 if (ShuffleMode.Equals(GroupShuffleMode.Shuffle))
@@ -298,7 +298,7 @@ namespace MediaBrowser.Controller.SyncPlay.Queue
 
             LastChange = DateTime.UtcNow;
 
-            if (playingItem != null)
+            if (playingItem is not null)
             {
                 if (playlistItemIds.Contains(playingItem.PlaylistItemId))
                 {