public ActionResult Create(ReservationFee reservationfee)
 {
     if (ModelState.IsValid) {
         reservationfeeRepository.InsertOrUpdate(reservationfee);
         reservationfeeRepository.Save();
         return RedirectToAction("Index");
     } else {
         ViewBag.PossiblePlaygrounds = playgroundRepository.All;
         return View();
     }
 }
 public void InsertOrUpdate(ReservationFee reservationfee)
 {
     if (reservationfee.ReservationFeeId == default(int)) {
         // New entity
         context.ReservationFees.Add(reservationfee);
     } else {
         // Existing entity
         context.Entry(reservationfee).State = EntityState.Modified;
     }
 }