delegate委托的例子，实现对Form中控件的更新

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Windows.Forms;namespace Invoketest{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        public void UpdateForm(string param1, string parm2)        {            this.textBox1.Text = param1 + parm2;        }        public delegate void UpdateForm_dl(string str1, string str2);        private void Calldelegate()        {            /*在Windows窗体应用程序中使用this.Invoke    在WPF应用程序中使用this.Dispatcher.Invoke*/            this.BeginInvoke(new UpdateForm_dl(UpdateForm), new  [] { "我是文本框", "haha" });            //this.Dispatcher.BeginInvoke(new UpdateForm_dl(UpdateForm), new  [] { "我是文本框", "haha" });        }        public void DoWork()        {            Calldelegate();        }        private void Form1_Load(  sender, EventArgs e)        {        }        private void button1_Click(  sender, EventArgs e)        {            Thread thread = new Thread(new ThreadStart(DoWork));            thread.Start();        }    }}