Interop Activex or .NET API? Which one is recommended?

[apoorva_jukanti]

Hi,

My requirement is migrating a desktop application from .vbp to .net. 

Present code in vb is using ActiveX object to launch the autocad application and insert blocks and deal with the block attributes. The major existing project is to use the existing drawing blocks in specific path and modify and replace them.

Now while migrating it to .net which is the optimized way(recommended waY) to implement the above mentioned functionality, ActiveX or Autocad .Net API?

Please suggest a viable solution.

[JPR_INTT]

Thank you for your answer. Yes, I meant it. Because several times I need a polyline to be a guide of pipeline in revit. So, in order to avoid generating an excel sheet with the coordinates, I'd like to get it directly. I appreciate your explanation. Best regards.