public static string SendMessage(string url, Encoding encode = null)
        {
            string result;

            try
            {
                var webClient = new WebClient { Encoding = Encoding.UTF8 };
                if (encode != null)
                    webClient.Encoding = encode;
                result = webClient.DownloadString(url);
            }
            catch (Exception ex)
            {
                result = ex.Message;
            }
            return result;
        }