From the reference versions, it looks like you are developing on 2012.
If that is so, check out this post which covers issues with 2012 com references, including a fix.
http://forums.autodesk.com/t5/AutoCAD-Civil-3D-Customization/NET-on-C3D-2012-SP1/m-p/3239124#M6012
or check out this post on adn dev blog on the same issue with fixes.
http://adndevblog.typepad.com/infrastructure/2012/05/cannot-build-civil-3d-2012-com-with-net-code-af...
Hope this is the solution you are after.
If a post provides a fix for your issue, click on "Accept as Solution" to help other users find solutions to problems they might have that are similar to yours.
Andrew Puller
Maitland, NSW, Australia
Windows 10 Enterprise 64bit
Intel core i7 11800 @ 2.30 GHz with 32GB Ram
Civil 3d 2023