Fix warnings in MediaBrowser.Controller/Session

MediaBrowser.Controller/Session/ISessionController.cs

@@ -26,6 +26,12 @@ namespace MediaBrowser.Controller.Session
         /// <summary>
         /// Sends the message.
         /// </summary>
+        /// <typeparam name="T">The type of data.</typeparam>
+        /// <param name="name">Name of message type.</param>
+        /// <param name="messageId">Message ID.</param>
+        /// <param name="data">Data to send.</param>
+        /// <param name="cancellationToken">CancellationToken for operation.</param>
+        /// <returns>A task.</returns>
         Task SendMessage<T>(SessionMessageType name, Guid messageId, T data, CancellationToken cancellationToken);
     }
 }