private static string Descoder()        {           //ajax地址            string MealFilePath = "http://***/user/SetWebsite.aspx";            WebResponse result = null;            WebRequest req = WebRequest.Create(MealFilePath);            result = req.GetResponse();            Stream sr = result.GetResponseStream();            Encoding encode = System.Text.Encoding.GetEncoding("GB2312");            StreamReader strAddress = new StreamReader(sr, encode);            return strAddress.ReadToEnd();        }