AutoCAD Inventor :: Extracting Sketch Curves Points

Given a sketch, I wish to get its profile paths (outer, plus inners), for each path, I wish to get their individual curves (line, arc, splines, any type). For lines, I need start and end points, for others, some sample points would do.

For "T" like thin profile shape, following code got me, 1 Profile Path, which had 8 Lines (thus 8 points) and it worked fine. 

For Each path As Inventor.ProfilePath In extFeature.Profile

If Not path Is Nothing And path.Count > 0 Then
For Each entity As Inventor.ProfileEntity In path
If entity.CurveType = Curve2dTypeEnum.kLineSegmentCurve2d Then
Dim oSkE As SketchEntity = entity.SketchEntity
Dim oLine As SketchLine = CType(oSkE, SketchLine)
Dim startpt As Inventor.Point2d = oLine.StartSketchPoint.Geometry
Dim endpt As Inventor.Point2d = oLine.EndSketchPoint.Geometry

But same logic does not work (crashes at Casting I guess) for "S" shape as below:

It gives path.Count == 0.