Creates an arc through the given reference points. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0) 
  Since:  2014 
Syntax
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Parameters
- document
-  Type:  Autodesk.Revit.DB Document  
 The Document.
- startPoint
-  Type:  Autodesk.Revit.DB ReferencePoint  
 The start point of the arc.
- endPoint
-  Type:  Autodesk.Revit.DB ReferencePoint  
 The end end of the arc.
- interiorPoint
-  Type:  Autodesk.Revit.DB ReferencePoint  
 The interior point on the arc.
Return Value
The CurveElement to be created.Remarks
 The interiorPoint determines the orientation of the arc while startPoint and endPoint determine the angle parameters at the ends. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was null | 
| Autodesk.Revit.Exceptions InvalidOperationException | Can't create an arc from the given points |