winform线程委托给主线程

1.

     private void Add()
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new MethodInvoker(delegate { Add(); }));
                return;
            }
           //代码
        }                    

2.

  ThreadPool.QueueUserWorkItem(new WaitCallback((obj) =>
                             {

                         }));