Replace != null with is not null

16 files changed, 58 insertions, 58 deletions

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)));