/// <summary>
/// Delete a reservation:
/// 1. delete all RoomReservation
/// 2. delete Reservation
/// 3. delete Client
/// </summary>
public static void DeleteReservation(int idReservation)
{
Reservation reservation = ReservationDB.GetReservation(idReservation);
ReservationDB.DeleteRoomReservation(idReservation);
ReservationDB.DeleteReservation(idReservation);
ClientDB.DeleteClient(reservation.Client.IdClient);
}