//crée une nouvelle reservation
public static int NewReservation(String NameClient, String FirstNameClient, DateTime CheckIn, DateTime CheckOut, int idRoom, int PriceIncreased)
{
int IdReservation = ReservationDB.NewReservation(NameClient, FirstNameClient, CheckIn, CheckOut);
RoomReservationManager.NewRoomReservation(IdReservation, idRoom, PriceIncreased);
return(IdReservation);
}
