HttpWebRequest request = (HttpWebRequest)WebRequest.Create(s_url);

byte[] dataStream = Encoding.UTF8.GetBytes(json_text);

request.ContentLength = dataStream.Length;

request.Method = WebRequestMethods.Http.Post;

request.ContentType = "application/x-www-form-urlencoded";

request.Credentials = CredentialCache.DefaultCredentials;

request.UserAgent = "";

request.Timeout = 2000;

request.KeepAlive = false;

 

Stream stream = request.GetRequestStream();

stream.Write(dataStream, 0, dataStream.Length);

stream.Flush();

stream.Close();

 

HttpWebResponse hr = null;

 

try

{

    hr = (HttpWebResponse)request.GetResponse();

}