private void FillCaptcha()
        {
            try
            {
                var    Captcha = new R2CoreInstanceCaptchaManager();
                string CWord   = Captcha.GenerateFakeWord(5);
                Session["_CaptchaWord"] = CWord;
                Bitmap CImage = Captcha.GenerateCaptcha(CWord);

                CImage.Save(Server.MapPath("~/Images/Captcha.jpg"));
                ImgCaptcha.ImageUrl = "~/Images/Captcha.jpg";
                //ImgCaptcha.ImageUrl = "data:image/jpg;base64," + Convert.ToBase64String((new JsonImage(CImage)).GetRawData());
            }
            catch (Exception ex)
            { Page.ClientScript.RegisterStartupScript(GetType(), "WcViewAlert", "WcViewAlert('1','" + ex.Message + "');", true); }
        }