static void Main(string[] args)
{
Urun u = new Urun()
{
Adi = "Centro", Fiyati = 10
};
Memento m = u.CreateCopy();
u.Goster();
u.Adi = "DEGISTI";
u.Goster();
u.Restore(m);
u.Goster();
Console.ReadLine();
}