static void Main()
{
Rectangle r1 = new Rectangle(3, 4);
Console.WriteLine(r1.Area);
Rectangle r2 = new Square(3);
Console.WriteLine(r2.Area);
r1.Zoom(2, 3);
Console.WriteLine(r1.Area);
//r2.Zoom(2,3);
((Square)r2).Zoom(3);
Console.WriteLine(r2.Area);
Console.ReadKey();
List <Rectangle> list = new List <Rectangle>(16);
list.Add(new Rectangle(1, 2));
list.Add(new Rectangle(1, 3));
list.Add(new Rectangle(1, 4));
list.Add(new Rectangle(1, 5));
list.Add(new Rectangle(1, 6));
list.Add(new Square(1));
list.Add(new Square(2));
list.Add(new Square(3));
list.Add(new Square(4));
foreach (var rectangle in list)
{
Console.WriteLine("Length={0},Width={1},Area={2}", rectangle.Length, rectangle.Width, rectangle.Area);
}
Console.ReadKey();
foreach (var rectangle in list)
{
rectangle.Zoom(2, 3);
Console.WriteLine("Length={0},Width={1},Area={2}", rectangle.Length, rectangle.Width, rectangle.Area);
}
Console.ReadKey();
}