partial void DeleteReservationDetailBilling(ReservationDetailBilling instance);
 partial void InsertReservationDetailBilling(ReservationDetailBilling instance);
 partial void UpdateReservationDetailBilling(ReservationDetailBilling instance);
		private void detach_ReservationDetailBillings(ReservationDetailBilling entity)
		{
			this.SendPropertyChanging();
			entity.ReservationDetail = null;
		}