public HttpResponseMessage GetCaptcha()
        {
            ATISMobileWebApi WebAPi = new ATISMobileWebApi();
            try
            {
                //تایید اعتبار کلاینت
                WebAPi.AuthenticateClientGetCaptcha(Request);

                var NSSSoftwareuser = WebAPi.GetNSSSoftwareUser(Request);
                var InstanceSoftwareusers = new R2CoreInstanseSoftwareUsersManager();
                var InstanceCaptcha = new R2CoreInstanceCaptchaManager();
                var CaptchaImage = InstanceCaptcha.GenerateCaptcha(InstanceSoftwareusers.GetCaptchaNumericforSoftwareUser(NSSSoftwareuser));
                ImageRawData IImage = new ImageRawData();
                IImage.IRawData = (new JsonImage(CaptchaImage)).GetRawData();
                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
                response.Content = new StringContent(JsonConvert.SerializeObject(IImage), Encoding.UTF8, "application/json");
                return response;
            }
            catch (Exception ex)
            { return WebAPi.CreateErrorContentMessage(ex); }
        }