private void EnforceInvariants(HotelRoomSummary rooms)
{
if (rooms.NumberOfSingleRooms < 1 &&
rooms.NumberOfDoubleRooms < 1 &&
rooms.NumberOfFamilyRooms < 1)
{
throw new Exception("Hotels Must Have Rooms");
}
}
public Hotel(Guid id, HotelRoomSummary rooms)
{
EnforceInvariants(rooms);
this.Id = id;
this.Rooms = rooms;
}