Rotate line by C#

Rhino.Inside CPython
1

I had trouble using this method
Glad to help.
I want to rotate a line

rorate.gh (5.8 KB)

2

image
image1280×703 120 KB

private void RunScript(Point3d pt, Line line, ref object A)
{
  line.Transform(Transform.Rotation(Math.PI*0.5, pt));
  A = line;
}

Rotation.gh (2.3 KB)