//windows ce 的winform 不能使用异步委托
        private void linkLabel_Click(object sender, EventArgs e)
        {
               Thread t = new Thread(new ThreadStart(DoWork));
               t.IsBackground = true;
               t.Start();  
        }

        private delegate void MyDelegate();
     
        string ss="";

        private void DoWork()
        {
            //....... 

            ss ="abcd";

            if (this.label6.InvokeRequired)
            {
                Invoke(new MyDelegate(MyMethod));
            }
        }

        private void MyMethod()
        {
           label6.Text = ss;
        }