public TransparentShape2(Shape2 shape, float transparency)
{
this.shape = shape ?? throw new ArgumentNullException(nameof(shape));
this.transparency = transparency;
}
public ColoredSquare2(Shape2 shape, string color)
{
this.shape = shape ?? throw new ArgumentNullException(nameof(shape));
this.color = color ?? throw new ArgumentNullException(nameof(color));
}
