public static void ArcTo(this IFigureTarget _, Rectangle r, double start, double stop, ArcDirection direction = ArcDirection.Clockwise)
{
_.ArcTo(r.X, r.Y, r.Width, r.Height, start, stop, direction);
}
public static void BezierTo(this IFigureTarget _, Point span1, Point span2, Point end)
{
_.BezierTo(span1.X, span1.Y, span2.X, span2.Y, end.X, end.Y);
}
public static void LineTo(this IFigureTarget _, Point p)
{
_.LineTo(p.X, p.Y);
}