Decorator.SetComponent C# (CSharp) Method

    public void SetComponent(Component component)
    {
        Component = component;
    }

        private void DecoratorClick(object sender, RoutedEventArgs e)
        {
            RectangleNew rectangle = new RectangleNew();
            Decorator    decorator = new Decorator();

            decorator.SetComponent(rectangle);
            decorator.OperationSetColorBlack();
            canvas.Children.Add(decorator.Show());
        }