// GET: RegistrationClients/Delete/5
        public ActionResult Delete(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            var registration = registrationRepository.FindRegistration(id);

            // Registration registration = db.Registrations.Find(id);
            if (registration == null)
            {
                return(HttpNotFound());
            }

            return(View(registration));
        }