网站读取问题，急（我爸是李刚帮我哈哈）

URL = http://www.ibc123.com/head.aspx

       public string GetHTMLTCP(string URL)

        {

            string strHTML = "";//用来保存获得的HTML代码

            TcpClient clientSocket = new TcpClient();

            Uri URI = new Uri(URL);

            clientSocket.Connect(URI.Host, URI.Port);

            StringBuilder RequestHeaders = new StringBuilder();//用来保存HTML协议头部信息

            RequestHeaders.AppendFormat("{0} {1} HTTP/1.1\r\n", "GET", URI.PathAndQuery);

            RequestHeaders.AppendFormat("Connection:close\r\n");

            RequestHeaders.AppendFormat("Host:{0}\r\n", URI.Host);

          //RequestHeaders.AppendFormat("Cookie:{0}\r\n", cooke);

            //RequestHeaders.AppendFormat("CookieContainer:{0}\r\n", cok);

            RequestHeaders.AppendFormat("Accept:*/*\r\n");

            RequestHeaders.AppendFormat("Accept-Language:zh-cn\r\n");

            RequestHeaders.AppendFormat("User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)\r\n\r\n");

            Encoding encoding = Encoding.Default;

            byte[] request = encoding.GetBytes(RequestHeaders.ToString());

            clientSocket.Client.Send(request);

            //获取要保存的网络流

            Stream readStream = clientSocket.GetStream();

            StreamReader sr = new StreamReader(readStream, Encoding.Default);

            strHTML = sr.ReadToEnd();

            readStream.Close();

            clientSocket.Close();

            return strHTML;

        }

读取到的是这样的。。。 是否还少了什么参数。 大家帮忙看下！！ 实际我是想得到 验证码。 这不是页面的代码！！

HTTP/1.1 200 OK
Date: Fri, 22 Oct 2010 10:31:19 GMT
Server: Microsoft-IIS/6.0
Set-Cookie: ASP.NET_SessionId=55im2x55iui1pbqvb5clggye; path=/; HttpOnly
Connection: close
X-Powered-By: ASP.NET
Content-Type: text/html; charset=utf-8
Cache-Control: private
Content-Length: 55
X-AspNet-Version: 2.0.50727

<script>window.top.location.href='index.aspx?'</script>