static void Main(string[] args)
{
CarInfo carInfo = new CarInfo();
Year year = new Year(1999);
Brand brand = new Brand("Opel");
Price price = new Price(2300.55);
Color color = new Color("Black");
Console.WriteLine(brand.strAccept(carInfo));
Console.WriteLine(year.Accept(carInfo));
Console.WriteLine(color.strAccept(carInfo));
Console.WriteLine(price.dbAccept(carInfo));
}