static void Main(string[] args) { Console.WriteLine(args); Array.ForEach(args, Console.WriteLine); var myDetail = new Person() { FirstName = "John", LastName = "Doe" }; myDetail.MeetPerson(); var studentDetail = new Student() { FirstName = myDetail.FirstName, LastName = myDetail.LastName }; studentDetail.MeetPerson(); studentDetail.SetAge(21); studentDetail.ShowAge(); studentDetail.GoToClasses(); var myTeacher = new Teacher() { FirstName = "Paul", LastName = "Bulton", student = studentDetail }; myTeacher.SetAge(30); myTeacher.MeetPerson(); myTeacher.Explain("Maths"); Console.ReadLine(); }