I just subscribed to the C3D Groups to have a sticky-beak ...
Peter Funk, Civil 3D Product Manager from Autodesk, sure sems to be hands on. It would be great if the language customisation for Vanilla received that sort of attention.
I know this has probably been said before, but if, as stated, " most of [our] API
development efforts are focused on .NET" the quality and scope of available documentation really needs to be addressed.
Good fortune with your endevour Jeff ..
kwb