public static void Main() { var cathy = new Person("Cathy", "French"); var boeing = new Airplane(400, 200, "Boeing"); var v1 = new Vehicle(12, 20); var phil = new Hunter("Phil", "Anderson", "Pentax"); var gameObject = new List <Object>() { cathy, boeing, v1, phil }; foreach (var item in gameObject) { Console.WriteLine(item.ToString()); } SpartaWrite(phil); SpartaWrite(cathy); }