public ActionResult Register(UserDetail userdetail)
        {
            userdetail.Ticket = Guid.NewGuid().ToString();
            userRepository.Add(userdetail);

            bool cvp = MailHelper.AktivasyonKoduGonder(userdetail.UserName, userdetail.Email, userdetail.Ticket);

            if (cvp)
            {
                return(RedirectToAction("Login"));
            }

            return(View());
        }