public string GetMessageList(string callType, string xmlMessage)
        {
            string   result = "", type = "99", receiverId = "";
            DateTime bdate = DateTime.Now, expiratoindate = DateTime.Now, edate = DateTime.Now;

            string logID = Guid.NewGuid().ToString();

            try
            {
                FileLogger.WriteLog(logID + "|Start:" + xmlMessage, 1, "", callType);

                if (CheckAuthCode(callType, xmlMessage))
                {
                    ydbMessage msg = new ydbMessage();
                    result = msg.GetListXML(xmlMessage);
                }
            }
            catch (Exception err)
            {
                result = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" +
                         "<GetMessageList>" +
                         "<Result>False</Result>" +
                         "<Description>" + err.Message + "</Description></GetMessageList>";
            }
            FileLogger.WriteLog(logID + "|End:" + result, 1, "", callType);
            return(result);
        }