static void Main(string[] args) { Gamer gamer1 = new Gamer() { GamerId = 1, GamerFirstName = "Semih", GamerLastName = "Arslan", GamerNationalityId = "11111111111", GamerDateOfBirth = "1900.5.5" }; GamerManager gamerManager = new GamerManager(new GamerValidationManager()); gamerManager.Add(gamer1); Game game1 = new Game() { GameName = "Grand Theft Auto V", GamePrice = 500 }; GameManager gameManager = new GameManager(); gameManager.Add(game1); GameOwnerManager gameOwnerManager = new GameOwnerManager(); gameOwnerManager.OwnGame(game1, gamer1); Campaign campaign1 = new Campaign { CampaignName = "Student Campaign", CampaignDiscountAmount = 50 }; CampaignManager campaignManager = new CampaignManager(); campaignManager.BuyWithCampaign(game1, campaign1, gamer1); }