[Multithreading]关于ThreadPool.QueueUserWorkItem

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

namespace ConsoleApplication26
{
class Program
{
static void Main(string[] args)
{
ThreadPool.QueueUserWorkItem(delegate
{
Console.WriteLine("委托方式.");
Console.WriteLine(string.Format("{0}-ThreadPool.QueueUserWorkItem Example By delegate", DateTime.Now));
PrintLine();
});
Console.WriteLine("普通方式");
WaitCallback _wCallBack = new WaitCallback(ProcessCallBack);
ThreadPool.QueueUserWorkItem(_wCallBack, "ThreadPool.QueueUserWorkItem Example1 by Normal");
ThreadPool.QueueUserWorkItem(_wCallBack, "ThreadPool.QueueUserWorkItem Example2 by Normal");
ThreadPool.QueueUserWorkItem(_wCallBack, "ThreadPool.QueueUserWorkItem Example3 by Normal");
ThreadPool.QueueUserWorkItem(_wCallBack, "ThreadPool.QueueUserWorkItem Example4 by Normal");
PrintLine();
ThreadPool.QueueUserWorkItem(callBack =>
{
Console.WriteLine("Lambda方式.");
Console.WriteLine(string.Format("{0}-ThreadPool.QueueUserWorkItem Example by Lambda", DateTime.Now));
PrintLine();
});
Console.ReadLine();
}

private static void ProcessCallBack(object state)
{
Console.WriteLine(string.Format("{0}-{1} start.", DateTime.Now, (string)state));
Thread.Sleep(500);
Console.WriteLine(string.Format("{0}-{1} end.", DateTime.Now, (string)state));
}
static void PrintLine()
{
Console.WriteLine("-----------------------------------------------------------------------------");
}
}
}

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