static void Main(string[] args)
{
Square s = new Square(20);
Rectangle rect = (Rectangle)s;
Console.WriteLine("Rectangle Length: {0}, Height: {1}", rect.length, rect.height);
Console.ReadLine();
}
private static void CustomConversion()
{
//Rectangle r = new Rectangle(20, 10);
//Square s = (Square)r;
Square s = new Square(20);
Rectangle rect = s;
Console.WriteLine("Rectangle Length: {0}, Height: {1}", rect.length, rect.height);
//Console.WriteLine("Square: {0}", s.side);
}