用c#读取网页内容

  //要得到的网页。
   WebRequest req = WebRequest.Create("http://www.88te.com");
   try
   {
    WebResponse result = req.GetResponse();

    //得到的流是网页内容   

    Stream ReceiveStream = result.GetResponseStream();

   StreamReader readerOfStream = new StreamReader(ReceiveStream,

                   System.Text.Encoding.GetEncoding("GB2312"));

    string aa= readerOfStream.ReadToEnd();

    Response.Write(aa);

    ReceiveStream.Close();

  }
   catch(Exception)
   {

……
   }