Polynode equivalent

[jeffdyerSRT]

I am testing upgrading to ClipperLib but have this recursive code and can't seem to follow the equivalent for a PolyTree (I have open paths/lines so this was the implementation used) - the polyNode would be populated from a Clipper.Execute - could anyone point me in the right direction?

    public void AddContours(IntFeature feature, PolyNode polyNode, string name, List<IntGeometry> newgeoms)
    {
        SVector3d lonLatAlt = new SVector3d();

        for (int i = 0; i < polyNode.ChildCount; i++)
        {
            if (polyNode.Childs[i].Contour.Count > 0)
            {
                 (Do stuff)               
            }

            if (polyNode.Childs[i].ChildCount > 0)
                AddContours(feature, polyNode.Childs[i], name, newgeoms);
        }
    }