static void Main(string[] args)
 {
     TechnicsThings a = new TechnicsThings(120, "SONY");
     Console.WriteLine("TechnicsThings a: ");
     a.PrintInformation();
     Player b = new Player();
     b.Price = 1000;
     b.Manufacturer = "Apple";
     b.RecordingFormat = "*.WMA";
     Console.WriteLine("Player b: ");
     b.PrintInformation();
     VideoPlayer d = new VideoPlayer(1000, "Canon", "*.AVI", "CMOS");
     Console.WriteLine("VideoPlayer d: ");
     d.PrintInformation();
     Console.ReadKey();
 }
        static void Main(string[] args)
        {
            TechnicsThings a = new TechnicsThings(120, "SONY");

            Console.WriteLine("TechnicsThings a: ");
            a.PrintInformation();
            Player b = new Player();

            b.Price           = 1000;
            b.Manufacturer    = "Apple";
            b.RecordingFormat = "*.WMA";
            Console.WriteLine("Player b: ");
            b.PrintInformation();
            VideoPlayer d = new VideoPlayer(1000, "Canon", "*.AVI", "CMOS");

            Console.WriteLine("VideoPlayer d: ");
            d.PrintInformation();
            Console.ReadKey();
        }