Gets the relationship between the CurveElement and face. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0) 
  Since:  2012 
Syntax
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Parameters
- curveElem
-  Type:  Autodesk.Revit.DB CurveElement  
 The CurveElement.
Return Value
Whether or not the CurveElement should lie on the face and be able to be added to the face.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The input CurveElement is not a CurveByPoints. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was null |