WPF 回到主线程

目前发现

正确：

 Application.Current.Dispatcher.Invoke((Action)delegate ()
 {
     //要更新的UI代码
            int a = Thread.CurrentThread.ManagedThreadId;
           
    });

错误：

    System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(new Action(() =>
     {
            int a = Thread.CurrentThread.ManagedThreadId;
          
        }));