public Marks()
{
ProductList = new HashSet <Product>();
VehicleList = new HashSet <Vehicle>();
ModelMarkList = new HashSet <Marks>();
ModelMark = new Marks();
}
public Vehicle()
{
WorshopBookingList = new HashSet <WorshopBooking>();
WorkOrderList = new HashSet <WorshopWorkorder>();
VehicleCategory = new VehicleCategory();
VehicleColor = new Colors();
Mark = new Marks();
Owner = new Customer();
}