How to construct a plane using a brep in rhinocommon?

Rhino Developer
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1

With the same result as CPlane - Object - Click brep would achieve?

2

Hello - if the face is planar, then BrepFace.UnderlyingSurface().TryGetPlane() or .FrameAt() with the mid domain in U and V specified for FrameAt. FrameAt() is probably more versatile.

-Pascal