using System;

using System.Collections;

using System.Collections.Generic;

using System.Net;

using System.Threading;

using System.Net.Sockets;

using System.Net.NetworkInformation;

public class ThreadDemo

{

    public static void Main()

    {

        List<Thread> tls = new List<Thread>();

        System.Net.ServicePointManager.DefaultConnectionLimit = ;//最大并发数，.net默认并发只有2个

        for (int i = ; i < ; i++)

        {

            tls.Add(new Thread(new ThreadStart(test)));

            tls[i].Name = "线程" + (i + );

            tls[i].Start();

        }

    }

    public static void test()

    {

        new RequestTest().GetRequest(Thread.CurrentThread.Name, "http://163.com");

    }

}

public class RequestTest

{

    System.Net.HttpWebRequest httpReq = null;

    System.Net.HttpWebResponse httpRes = null;

    /// <summary>

    /// 通过WebRequest来访问网址，网址必须包含http:或https:

    /// </summary>

    /// <param name="threadName">当前线程</param>

    /// <param name="url">要访问的网址</param>

    public void GetRequest(string threadName, string url)

    {

        if (string.IsNullOrEmpty(url) || url.Length <= ) return;

        DateTime dt = DateTime.Now;

        if (!url.Contains("."))

        {

            return;

        }

        if (!url.Contains("http://") && !url.Contains("https://"))

            url = "http://" + url;

        try

        {

            httpReq = (HttpWebRequest)WebRequest.Create(url);

            httpReq.Proxy = null;//不使用代理 .NET4.0中的默认代理是开启的

            httpReq.KeepAlive = false;//不建立持久性连接

            httpReq.Timeout = ;//连接网址的超时时间

            httpReq.ReadWriteTimeout = ;//读取网址内容的超时时间

            httpRes = (HttpWebResponse)httpReq.GetResponse();

            Console.WriteLine(threadName + "  " + url + ":" + httpRes.StatusCode);

        }

        catch (Exception e)

        {

            Console.WriteLine(threadName + "  " + url + " Error:" + e.Message);

        }

        finally

        {

            if (httpRes != null)

            {

                httpRes.Close();//关闭连接

            }

            if (httpReq != null)

            {

                httpReq.Abort();//中止请求

            }

            httpReq = null;

            httpRes = null;

            System.GC.Collect();//强制垃圾回收,并释放资源

        }

    }

}