private static void Main(string[] args) { //Gammers Gammer gammer1 = new Gammer { Id = 1, FirstName = "Adil", LastName = "Bayraktar", BirthDate = new DateTime(1997, 1, 1), NationlityId = "123456789" }; Gammer gammer2 = new Gammer { Id = 2, FirstName = "Ali", LastName = "Aslan", BirthDate = new DateTime(2001, 5, 28), NationlityId = "546831282" }; IGammerService gammer = new GammerManager(); gammer.Add(gammer1); gammer.Update(gammer1); gammer.Add(gammer2); gammer.Delete(gammer2); Console.WriteLine("-----------------------------"); //Games Games game1 = new Games { Id = 01, GameName = "Gta", GameType = "Action" }; Games game2 = new Games { Id = 02, GameName = "Cs", GameType = "Action" }; IGamesService game = new GamesManager(); game.Buy(gammer1, game1); game.Buy(gammer2, game2); Console.WriteLine("-----------------------------"); //Campaigns Campaign campaign1 = new Campaign { campaignId = 001, campaignRange = 25 }; Campaign campaign2 = new Campaign { campaignId = 002, campaignRange = 65 }; ICampaignService campaign = new CampaignManager(); campaign.Discount(game1, campaign1); campaign.Discount(game2, campaign2); }