static void Main(string[] args) { GamerManager gamerManager = new GamerManager(new UserValidationManager()); gamerManager.Add(new Gamer { Id = 1, FirstName = "Mustafa", LastName = "Turan", BirthYear = 2000, IdentiyNumber = 12345 }); TournamentManager tournamentManager = new TournamentManager(); tournamentManager.Add(new Tournament { Id = 1, TournamentName = "CS GO 1v1", TournamentDate = "2021", TournamentPrize = 10000, TournamentPlace = "Istanbul" }); }