static void Main(string[] args)
        {
            //Не съм решил всичко писъл съм до 4-тата част но не я разбрах напълно и не я написах много коректно.
            Item sallingerBook = new Book("4adwlj4", "Catcher in the Rye", 20.00m, "J. D. Salinger", "fiction");
            Item threeManBook  = new Book("84djesd", "Three Men in a Boat", 39.99m, "Jerome K. Jerome", new List <string> {
                "comedy"
            });
            Item acGame           = new Game("9gkjdsa", "AC Revelations", 78.00m, "historical", AgeRestriction.Teen);
            Item bubbleSplashGame = new Game("r8743jf", "Bubble Splash", 7.80m, new List <string> {
                "child", "fun"
            });
            Item godfatherMovie = new Movie("483252j", "The Godfather", 99.00m, 178, "crime");
            Item dieHardMovie   = new Movie("9853kfds", "Die Hard 4", 9.90m, 144, new List <string> {
                "action", "crime", "thriller"
            });

            DateTime today        = DateTime.Now;
            DateTime fiveYearsAgo = today.AddYears(-5);
            Sale     dieHardSale  = new Sale(dieHardMovie, fiveYearsAgo);

            Console.WriteLine(dieHardSale.SaleDate);

            Sale acSale = new Sale(acGame);

            Console.WriteLine(acSale.SaleDate); // 1/30/2010 2:31:55 PM

            DateTime afterOneWeek = today.AddDays(30);
            Rent     bookRent     = new Rent(sallingerBook, today, afterOneWeek);

            Console.WriteLine(bookRent.RentStatus); // Pending

            DateTime lastMonth = today.AddDays(-34);
            DateTime lastWeek  = today.AddDays(-8);
            Rent     movieRent = new Rent(godfatherMovie, lastMonth, lastWeek);

            Console.WriteLine(movieRent.RentStatus); // Overdue

            movieRent.ReturnItem();
            Console.WriteLine(movieRent.RentStatus);          // Returned
            Console.WriteLine(movieRent.DateOfReturn);        // 1/30/2015 2:41:53 PM
            Console.WriteLine(movieRent.CalculateRateFine()); // 7.9200
        }