string rl;
            WebRequest Request = WebRequest.Create("http://family.3g.qq.com/family/party/index.jsp?sid=");            WebResponse Response = Request.GetResponse();
            Stream resStream = Response.GetResponseStream();            StreamReader sr = new StreamReader(resStream, Encoding.UTF8);            StringBuilder sb = new StringBuilder();            while ((rl = sr.ReadLine()) != null)
            {
                sb.Append(rl);
            }            string strhtml = sb.ToString();//抓取得到的源网页
        请问怎么利用代理访问到红色字体的网址,这个我没学过,求源代码修改,谢谢