c# 线程池中使用AutoResetEvent(事件)

using System;
using System.Threading;

namespace program
{
    class wangjun
    {
        static void Main(string[] args)
        {
            //构建一个AutoResetEvent对象（刚开始它没有收到信号）
            AutoResetEvent are = new AutoResetEvent(false);

            //告诉线程池等待AutoResetEvent对象
            RegisteredWaitHandle rwh = ThreadPool.RegisterWaitForSingleObject(
                are,             //等待AutoResetEvent对象
                EventOperation, //回调该方法
                null,            //将null传递给EventOperation
                5000,            //用5秒种时间等待事件发送信号
                false            //每一次当事件的信号被发送后都调用EventOperation方法
                );
            //进入循环
            Char operation;
            do
            {
                Console.WriteLine("S=Signal Q=Quit? ");
                operation = char.ToUpper(Console.ReadKey(true).KeyChar);
                if (operation == 'S')
                {
                    are.Set();
                }
            } while (operation !='Q');

        }

        //一旦事件的信号已被发送，或者最后一个信号或超时值已经过去了5秒钟，就调用这个方法
        private static void EventOperation(object state, Boolean timeout)
        {
            if (timeout)
            {
                Console.WriteLine("Timedout while waiting for the AutoResetEvent. ");
            }
            else
            {
                Console.WriteLine("The AutoResetEvent became signaled. ");
            }
        }
    }
}