3 files changed, 8 insertions, 8 deletions
diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs
index 067fecd87..3b182f7c9 100644
--- a/MediaBrowser.Controller/Entities/BaseItem.cs
+++ b/MediaBrowser.Controller/Entities/BaseItem.cs
@@ -112,7 +112,7 @@ namespace MediaBrowser.Controller.Entities
 
         private string _name;
 
-        public static char SlugChar = '-';
+        public const char SlugChar = '-';
 
         protected BaseItem()
         {
@@ -2050,7 +2050,7 @@ namespace MediaBrowser.Controller.Entities
 
         public virtual string GetClientTypeName()
         {
-            if (IsFolder && SourceType == SourceType.Channel && !(this is Channel))
+            if (IsFolder && SourceType == SourceType.Channel && this is not Channel)
             {
                 return "ChannelFolderItem";
             }
diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index d45a02cf2..dd08c31ed 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -233,7 +233,7 @@ namespace MediaBrowser.Controller.Entities
 
         public override bool IsVisible(User user)
         {
-            if (this is ICollectionFolder && !(this is BasePluginFolder))
+            if (this is ICollectionFolder && this is not BasePluginFolder)
             {
                 var blockedMediaFolders = user.GetPreferenceValues<Guid>(PreferenceKind.BlockedMediaFolders);
                 if (blockedMediaFolders.Length > 0)
@@ -673,7 +673,7 @@ namespace MediaBrowser.Controller.Entities
         {
             if (LinkedChildren.Length > 0)
             {
-                if (!(this is ICollectionFolder))
+                if (this is not ICollectionFolder)
                 {
                     return GetChildren(user, true).Count;
                 }
@@ -730,7 +730,7 @@ namespace MediaBrowser.Controller.Entities
                 return PostFilterAndSort(items, query, true);
             }
 
-            if (!(this is UserRootFolder) && !(this is AggregateFolder) && query.ParentId == Guid.Empty)
+            if (this is not UserRootFolder && this is not AggregateFolder && query.ParentId == Guid.Empty)
             {
                 query.Parent = this;
             }
@@ -805,7 +805,7 @@ namespace MediaBrowser.Controller.Entities
         {
             if (LinkedChildren.Length > 0)
             {
-                if (!(this is ICollectionFolder))
+                if (this is not ICollectionFolder)
                 {
                     Logger.LogDebug("Query requires post-filtering due to LinkedChildren. Type: " + GetType().Name);
                     return true;
@@ -1545,7 +1545,7 @@ namespace MediaBrowser.Controller.Entities
 
                 var childOwner = child.GetOwner() ?? child;
 
-                if (childOwner != null && !(child is IItemByName))
+                if (child is not IItemByName)
                 {
                     var childProtocol = childOwner.PathProtocol;
                     if (!childProtocol.HasValue || childProtocol.Value != Model.MediaInfo.MediaProtocol.File)
diff --git a/MediaBrowser.Controller/Entities/TV/Series.cs b/MediaBrowser.Controller/Entities/TV/Series.cs
index beda504b9..e4933e968 100644
--- a/MediaBrowser.Controller/Entities/TV/Series.cs
+++ b/MediaBrowser.Controller/Entities/TV/Series.cs
@@ -296,7 +296,7 @@ namespace MediaBrowser.Controller.Entities.TV
             // Refresh seasons
             foreach (var item in items)
             {
-                if (!(item is Season))
+                if (item is not Season)
                 {
                     continue;
                 }