1 files changed, 8 insertions, 4 deletions
diff --git a/Emby.Server.Implementations/Collections/CollectionImageProvider.cs b/Emby.Server.Implementations/Collections/CollectionImageProvider.cs
index 6aeadda2f..0244c4a68 100644
--- a/Emby.Server.Implementations/Collections/CollectionImageProvider.cs
+++ b/Emby.Server.Implementations/Collections/CollectionImageProvider.cs
@@ -10,14 +10,18 @@ using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Entities;
-using MediaBrowser.Model.Extensions;
 using MediaBrowser.Model.IO;
 
 namespace Emby.Server.Implementations.Collections
 {
     public class CollectionImageProvider : BaseDynamicImageProvider<BoxSet>
     {
-        public CollectionImageProvider(IFileSystem fileSystem, IProviderManager providerManager, IApplicationPaths applicationPaths, IImageProcessor imageProcessor) : base(fileSystem, providerManager, applicationPaths, imageProcessor)
+        public CollectionImageProvider(
+            IFileSystem fileSystem,
+            IProviderManager providerManager,
+            IApplicationPaths applicationPaths,
+            IImageProcessor imageProcessor)
+            : base(fileSystem, providerManager, applicationPaths, imageProcessor)
         {
         }
 
@@ -32,7 +36,7 @@ namespace Emby.Server.Implementations.Collections
             return base.Supports(item);
         }
 
-        protected override List<BaseItem> GetItemsWithImages(BaseItem item)
+        protected override IReadOnlyList<BaseItem> GetItemsWithImages(BaseItem item)
         {
             var playlist = (BoxSet)item;
 
@@ -76,7 +80,7 @@ namespace Emby.Server.Implementations.Collections
                 .ToList();
         }
 
-        protected override string CreateImage(BaseItem item, List<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType, int imageIndex)
+        protected override string CreateImage(BaseItem item, IReadOnlyCollection<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType, int imageIndex)
         {
             return CreateSingleImage(itemsWithImages, outputPathWithoutExtension, ImageType.Primary);
         }