多线程编程(3)：线程池ThreadPo

using System.Threading;
using System.Collections;
using System.Diagnostics;
using System;
using System.ComponentModel;

namespace ThreadPoolDemo
{
        class ThreadPoolDemo1
        {
                public ThreadPoolDemo1()
                {
                }

                public void Work()
                {
                        ThreadPool.QueueUserWorkItem(new WaitCallback(CountProcess));
                        ThreadPool.QueueUserWorkItem(new WaitCallback(GetEnvironmentVariables));
                }
                /// <summary>
                /// 统计当前正在运行的系统进程信息
                /// </summary>
                /// <param name="state"></param>
                private void CountProcess(object state)
                {
                        Process[] processes = Process.GetProcesses();
                        foreach (Process p in processes)
                        {
                                try
                                {
                                        Console.WriteLine("Id:{0},ProcessName:{1},StartTime:{2}", p.Id, p.ProcessName, p.StartTime);
                                }
                                catch (Win32Exception e)
                                {
                                        Console.WriteLine("ProcessName:{0}", p.ProcessName);
                                }
                                finally
                                {
                                }
                        }
                        Console.WriteLine("获取进程信息完毕。");
                }
                /// <summary>
                /// 获取当前机器系统变量设置
                /// </summary>
                /// <param name="state"></param>
                public void GetEnvironmentVariables(object state)
                {
                        IDictionary list=System.Environment.GetEnvironmentVariables();
                        foreach (DictionaryEntry item in list)
                        {
                                Console.WriteLine("key={0},value={1}", item.Key, item.Value);
                        }
                        Console.WriteLine("获取系统变量信息完毕。");
                }

  static void Main(string[] args)
                {
                        ThreadPoolDemo1 tpd1 = new ThreadPoolDemo1();
                        tpd1.Work();
                        Thread.Sleep(5000);

                        Console.WriteLine("OK");

                        Console.ReadLine();
                }
        }
}