Merge branch 'master' into studios-images-plugin

# Conflicts:
#	MediaBrowser.Providers/MediaBrowser.Providers.csproj

1 files changed, 4 insertions, 3 deletions

diff --git a/MediaBrowser.Controller/Collections/ICollectionManager.cs b/MediaBrowser.Controller/Collections/ICollectionManager.cs
index a6991e2eac..b8c33ee5a0 100644
--- a/MediaBrowser.Controller/Collections/ICollectionManager.cs
+++ b/MediaBrowser.Controller/Collections/ICollectionManager.cs
@@ -14,22 +14,23 @@ namespace MediaBrowser.Controller.Collections
         /// <summary>
         /// Occurs when [collection created].
         /// </summary>
-        event EventHandler<CollectionCreatedEventArgs> CollectionCreated;
+        event EventHandler<CollectionCreatedEventArgs>? CollectionCreated;
 
         /// <summary>
         /// Occurs when [items added to collection].
         /// </summary>
-        event EventHandler<CollectionModifiedEventArgs> ItemsAddedToCollection;
+        event EventHandler<CollectionModifiedEventArgs>? ItemsAddedToCollection;
 
         /// <summary>
         /// Occurs when [items removed from collection].
         /// </summary>
-        event EventHandler<CollectionModifiedEventArgs> ItemsRemovedFromCollection;
+        event EventHandler<CollectionModifiedEventArgs>? ItemsRemovedFromCollection;
 
         /// <summary>
         /// Creates the collection.
         /// </summary>
         /// <param name="options">The options.</param>
+        /// <returns>BoxSet wrapped in an awaitable task.</returns>
         Task<BoxSet> CreateCollectionAsync(CollectionCreationOptions options);
 
         /// <summary>