static void DecoratorTest()
{
Decorator.IShape circle = new Decorator.Circle();
Decorator.IShape redCircle = new RedShapeDecorator(new Decorator.Circle());
Decorator.IShape blueCircle = new BlueShapeDecorator(new Decorator.Circle());
Decorator.IShape redRectangle = new RedShapeDecorator(new Decorator.Rectangle());
Decorator.IShape redBlueCircle = new RedShapeDecorator(new BlueShapeDecorator(new Decorator.Circle()));
Console.WriteLine("Circle with normal border");
circle.draw();
Console.WriteLine("\nCircle of red border");
redCircle.draw();
Console.WriteLine("\nRectangle of red border");
redRectangle.draw();
Console.WriteLine("\nCircle of red and blue border ");
redBlueCircle.draw();
}