c#发送Http请求

　　　　　　　　  HttpWebRequest request = (HttpWebRequest)WebRequest.Create(redirectUrl);
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                using (StreamReader readStream = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    while (!readStream.EndOfStream)
                    {
                        ViewBag.Stream += readStream.ReadLine();
                    }
                }

 　　　　　　　　WebClient client = new WebClient();
　　　　　　　　 client.Encoding = Encoding.UTF8;
               string htmlStr = client.DownloadString(redirectUrl);
               ViewBag.Stream = htmlStr;