c#获取网页代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            WebClient _client = new WebClient();

            _client.BaseAddress = "http://www.cnblogs.com/guozili/archive/2011/01/19/1939157.html";
             _client.Headers.Add("Accept","image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*");
             _client.Headers.Add("Accept-Language","zh-cn");
             _client.Headers.Add("UA-CPU","x86");
             _client.Headers.Add("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)");
             Stream stream = _client.OpenRead("/");
             StreamReader sr = new StreamReader(stream, Encoding.UTF8);
            Console.WriteLine( sr.ReadToEnd());
        }
    }
}