public void CreateReservation()
        {
            Reservation          bk   = new Reservation();
            ReservationViewModel bwvm = new ReservationViewModel(bk);

            if (bwvm.Run())
            {
                rep.AddReservation(bk);
            }
        }
        public void UpdateReservation()
        {
            if (!IsSelected())
            {
                return;
            }
            ReservationViewModel bwvm = new ReservationViewModel(SelectedReservation);

            if (bwvm.Run())
            {
                rep.UpdateReservation(SelectedReservation);
            }
        }