I am using rhinocommon C# for a development project.

- I need to know how principle Curvature for a surface is calculated in rhino.
- Am only able to extract mean and gauss curvature for any point on a surface (using CurvatureAt function).

but i further need the direction of principle curvatures for my calculations.

Can anyone help on how i can find these direction vectors. though it is available with pythonscript, its not available with rhinocommon .net