static void Main(string[] args) { GamerManager gamerManager = new GamerManager(new UserValidationManager()); gamerManager.Add(new Gamer { Id = 1, BirthYear = 2000, FirstName = "HAMZA", LastName = "KARACA", IdentityNumber = 60406214340 }); SaleManager saleManager = new SaleManager(new PaymentValidation()); saleManager.sell(new Game { GameName = "Pubg", GameId = 1, Price = 50, ReleaseDate = 2018 }); Game game = new Game(); WinterCampaign winterCanpaign = new WinterCampaign(); winterCanpaign.Add(game); }