Not rectangle point. How to get intersection point coordinates of surface?

I made a surface by curves. When I tried to get the each intersection point coordinates of surface, but each points are rectangle point.
Please tell me how to get the intersection point coordinates.

Thank you

Not sure if this is what you want, but: Surface.PerimeterCurves > Curve.StartPoint might do the trick.

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Dear Jacob,
problem solved!
I appreciate your kindness.

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