Given an edge or a curve or a face, return all control points lying on it (in form of geometry references). 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Parameters
- curveOrEdgeOrFaceReference
-  Type:  Autodesk.Revit.DB Reference  
 The reference of an edge or curve or face.