MeshOutline in Rhino, takes surfaces, Polysurfaces as well as Meshes.
Rhino.MeshOutline ,however, seems to be friendly with meshes only.
I would rather not to convert polysurfaces to mesh in order to apply
Rhino.MeshOutline on them.
This is an Example:
Call Main() Sub Main() Dim strPol,strExt strPol = Rhino.AddPolygon(Rhino.WorldXYPlane, 10, 5) strExt = Rhino.ExtrudeCurveStraight(strPol, array(0, 0, 10)) Rhino.CapPlanarHoles strExt Rhino.MeshOutline strExt End Sub