static void Main() { House h = new House(120, "red"); System.Console.WriteLine("House: " + h.GetColor() + ", " + h.GetArea() + "m2"); Flat flat = new Flat(); System.Console.WriteLine("Flat: " + flat.GetColor() + ", " + flat.GetArea() + "m2"); SmallFlat sf = new SmallFlat(); System.Console.WriteLine("Small Flat: " + sf.GetColor() + ", " + sf.GetArea() + "m2"); sf.SetColor("yellow"); sf.SetArea(47); System.Console.WriteLine("Small Flat corrected: " + sf.GetColor() + ", " + sf.GetArea() + "m2"); }