static void Main() { Book book = new Book("Worley", "Inside ASP.NET", 10); book.Display(); Video video = new Video("Spielberg", "Jaws", 23, 92); video.Display(); Console.WriteLine("\nMaking video borrowable:"); Borrowable borrowvideo = new Borrowable(video); borrowvideo.BorrowItem("Customer #1"); borrowvideo.BorrowItem("Customer #2"); borrowvideo.Display(); Console.ReadKey(); }