public static void RoundedRectangle(this IGeometryFigures _, double x, double y, double width, double height, double cornerRadius)
{
_.RoundedRectangle(new Rectangle(x, y, width, height), cornerRadius);
}
public void RoundedRectangle(Rectangle rectangle, double cornerRadius)
{
_figures.RoundedRectangle(rectangle, cornerRadius);
}