static void Main(string[] args) { BankAccount obb = new BankAccount(); obb.Id = 1230001; obb.Balance = 550.02m; BankAccount ktb = new BankAccount(); ktb.Id = 40234134; ktb.Balance = 3m; List <BankAccount> accounts = new List <BankAccount> { obb, ktb }; Person stoyan = new Person("Stoyan", 23, accounts); Console.WriteLine(stoyan.GetBalance()); }