ThreadPool 线程池

ThreadPool_1.csCode highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using System;
using System.Text;
using System.Threading;

namespace 多线程
{
    public class Example
    {
        public static void Main()
        {
            // Queue the task.
            ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadProc));

            Console.WriteLine("Main thread does some work, then sleeps.");
          
            Thread.Sleep(1000);

            Console.WriteLine("Main thread exits.");
        }

        static void ThreadProc(Object stateInfo)
        {
            // No state object was passed to QueueUserWorkItem, 
            // so stateInfo is null.
            Console.WriteLine("Hello from the thread pool.");
        }
    }
}

ThreadPool_2.csCode highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

namespace CS_Test
{
    class ThreadPool_Demo
    {
        // 用于保存每个线程的计算结果
        static int[] result = new int[10];


        //注意：由于WaitCallback委托的声明带有参数，
        //      所以将被调用的Fun方法必须带有参数，即：Fun(object obj)。
        static void Fun(object obj)
        {
            int n = (int)obj;

            //计算阶乘
            int fac = 1;
            for (int i = 1; i <= n; i++)
            {
                fac *= i;
            }
            //保存结果
            result[n] = fac;
        }

        static void Main(string[] args)
        {
            //向线程池中排入9个工作线程
            for (int i = 1; i <= 9 ; i++)
            {
                //QueueUserWorkItem()方法：将工作任务排入线程池。
                ThreadPool.QueueUserWorkItem(new WaitCallback(Fun),i);
                // Fun 表示要执行的方法(与WaitCallback委托的声明必须一致)。
                // i   为传递给Fun方法的参数(obj将接受)。
            }

            //输出计算结果
            for (int i = 1; i <= 9; i++)
            {
                Console.WriteLine("线程{0}: {0}! = {1}",i,result[i]);
            }
        }

    }
}