you should to take time in to learn CIVIL 3D API
through
or
Setting up a .NET Project for Autodesk Civil 3D
https://help.autodesk.com/view/CIV3D/2024/ENU/?guid=GUID-DE3A46DA-508E-43A0-8538-C77D978D06B2
you should to take time in to learn CIVIL 3D API
through
or
https://help.autodesk.com/view/CIV3D/2024/ENU/?guid=GUID-DE3A46DA-508E-43A0-8538-C77D978D06B2