简单的异步操作实例，用回调函数

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

namespace ConsoleApplication3
{
    //public class test
    //{
    //    //------声明委托

    //}
    class Program
    {
        public delegate void myDel();

        public void ybMethod()
        {
            Thread.Sleep(2000);//------线程延迟

            Console.WriteLine("这是异步执行的内容");
        }

        public void CallMethos(IAsyncResult ia)
        {
            ((myDel)ia.AsyncState).EndInvoke(ia);
        }

        public static void Main()
        {
            Program p = new Program();
            myDel del = new myDel(p.ybMethod);
            del.BeginInvoke(p.CallMethos, del);
           
            for (int i = 0; i < 1000; i++)
            {
                //Thread.Sleep(1000);
                Console.WriteLine("这是主线程在工作中。。。。");
            }

 

            Console.ReadKey();
        }

    }
}