static void Main(string[] args) { User user1 = new User() { Id = 1, FirstName = "Yunus", LastName = "Yanık", DateOfYear = 1993, UserName = "******", NationalityId = 12345 }; UserManager userManager = new UserManager(new UserCheckManager()); userManager.Add(user1); Game game1 = new Game { CategoryId = 1, Description = "FPS", Developer = "SpaceY", Id = 1, Name = "Space Killer", Price = 15, Publisher = "SpaceY", ReleaseDate = new DateTime(2021) }; CartManager cartManager = new CartManager(new MobilPayAdapter()); cartManager.AddtoCart(game1, 1); cartManager.Purchase(user1); }