How to get intersect curve from two intersected faces?

[qoreodlf37]

Hi, I want to get intersect curve from two intersected faces.

So I tried to use "floorTopFace.Intersect(face, out Curve intersectCurve)".

But this method return always 'intersect'.

I researche about this method in forum, I found out that method has a bug for a long time.

I want to know intersected curve(red curves) from two faces(scarlet, blue).

How to I do?

[admaecc211151]

face.Intersect(face, out Curve intersectCurve)

in this function, the "out" is also a return value in another way.
so you can use intersectCurve as a curve in your codes after that.