Get outer contour

Hi,

I have a list of Sketch Contours, is there any way of finding which one of them is the most outer?

there is no ISketchContour :: IsOuter.

I didn't find helpful ILoop2 :: IsOuter  in this case because it returns true if it is the most outer loop of a face.

I need the most outer contour of all SketchContours.

Anyone has any idea? maybe with a bounding box, but I didn't find any bounding box for SketchContours...

Thanks

SolidworksApi macros