MAPIMPORT of SHP Data in Civil 3D
Stephen Walz shows how to use the MAPIMPORT command to import SHP files into Civil 3D. In this case the data is GIS Pipes data.
From the Stephen Walz YouTube Channel
Perhaps Stephen initially forgets to create a selection window area in this walkthrough. After he does that the video demonstrates the differnce in the results.
If you root around in the Civil 3D videos on his channel, you may see parts of the Framework for Civil 3D at work.