Path Optimization Software Development Project

I need a tool that I can import coordinates file and after optimizing and changing location of points, need export it as smoothen with interpolation.

- C# .net based
- Can use OpenGL
- .txt coordinates will be imported to software.
- Coordinates will be manually changed
- new points adding feature needed
-
- After path manual changing is done, coordinates will be exported to .txt file as optimatized with smooth shape like using arc trejectory or spline interpolation.

I have some examples with me. We can arrange an online meeting to discuss about it more.

Best