public void AddRoom(Room room)
{
if (ReservationRooms.Any(x => x.Room == room))
{
throw new HotelException($"Pokój {room} już istnieje w tej rezerwacji.");
}
var reservationRoom = new ReservationRoom(this, room);
ReservationRooms.Add(reservationRoom);
}
public bool IsRoomInReservation(Room room) => ReservationRooms.Any(x => x.Room.Id == room.Id);
