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");
}
