public static string HttpGet(string Url, string postDataStr)        {            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == string.Empty ? string.Empty : "?") + postDataStr);            request.Method = "GET";            request.ContentType = "text/html;charset=UTF-8";            HttpWebResponse response = (HttpWebResponse)request.GetResponse();            Stream myResponseStream = response.GetResponseStream();            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));            string retString = myStreamReader.ReadToEnd();            myStreamReader.Close();            myResponseStream.Close();            return retString;        }

string str1 = HttpUtility.UrlDecode(this.Request.QueryString.ToString(), Encoding.UTF8);