Specify a variable-radius bend. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Parameters
- vertexIndex
 -  Type:  System Int32  
Index of the vertex (1 to NumberOfVertices - 2). 
- turn
 -  Type:  Autodesk.Revit.DB.Structure RebarShapeVertexTurn  
Specify turn direction (RebarShapeVertexTurn::Left or RebarShapeVertexTurn::Right). 
- angle
 -  Type:  Autodesk.Revit.DB.Structure RebarShapeBendAngle  
Specify whether the bend is acute, obtuse, etc. 
- paramId
 -  Type:  Autodesk.Revit.DB ElementId  
Id of a parameter driving the radius. 
- measureIncludingBarThickness
 -  Type:  System Boolean  
If true, the radius is measured to the outside of the bend; if false, it is measured to the inside. 
Remarks
 You must add a bend between each two segments. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | vertexIndex is not between 0 and NumberOfVertices. -or- paramId is not the id of a shared parameter in the current document, or its unit type is not UT_Reinforcement_Length or UT_Angle. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | A value passed for an enumeration argument is not a member of that enumeration |