[Modify] Edit it

websocket-sharp/Server/WebSocketServiceManager.cs

@@ -339,13 +339,15 @@ namespace WebSocketSharp.Server
     /// </param>
     /// <param name="initializer">
     ///   <para>
-    ///   An <c>Action&lt;TBehavior&gt;</c> delegate or
-    ///   <see langword="null"/> if not needed.
+    ///   An <see cref="T:System.Action{TBehavior}"/> delegate.
     ///   </para>
     ///   <para>
     ///   The delegate invokes the method called when initializing
     ///   a new session instance for the service.
     ///   </para>
+    ///   <para>
+    ///   <see langword="null"/> if not necessary.
+    ///   </para>
     /// </param>
     /// <typeparam name="TBehavior">
     ///   <para>