委托异步体验

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

namespace Simple
{
    internal delegate void PrintMsg();

    class DelegateAsync
    {
        public event PrintMsg PrintMsg;

        public DelegateAsync()
        {
        }

        public void Execute()
        {

            for (int i = 0; i < 10; i++)
            {
                if (PrintMsg!=null)
                {
                    PrintMsg.BeginInvoke(new AsyncCallback(HandlerCallback),null);
                    Console.WriteLine("Thread" + Thread.CurrentThread.ManagedThreadId.ToString() + " run  now>>>>>>>>");
                }
                //PrintMsg.EndInvoke(ar); 
            }
            Console.WriteLine("works completed!");
        }

        void HandlerCallback(IAsyncResult ar)
        {
            PrintMsg pm=ar.AsyncState as PrintMsg;
            string id = Thread.CurrentThread.ManagedThreadId.ToString();
            Console.WriteLine("Thread" + id + " is " + Thread.CurrentThread.IsThreadPoolThread);
            if (pm!=null)
            {
                pm.EndInvoke(ar);
            }
        }
    }
}

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

namespace Simple
{
    class Program
    {
        static void Main(string[] args)
        {
            DelegateAsync da=new DelegateAsync();
            da.PrintMsg += new PrintMsg(Da_PrintMsg);
            da.Execute();
            Console.Read();
        }

        static void Da_PrintMsg()
        {
            string id = Thread.CurrentThread.ManagedThreadId.ToString();
            Console.WriteLine("Thread" + id + " is " + Thread.CurrentThread.IsThreadPoolThread);
            Console.WriteLine("Thread" + id + " work start now!");
            Thread.Sleep(10000);
            Console.WriteLine("Thread" + id + " am work completed now!");
        }
    }
}