Share 'About Rhino.Geometry.SweepOneRail'

Can you give me an example code of Rhino.Geometry.SweepOneRail  class? I can figure out What the paramments means in the function of "Rhino.Geometry.SweepOneRail.PerformSweepRefit". Hope you can give a simple code to show how to use this function. Thank you, I will be very appreciate  for it.