Return a transform representing the relative position of any individual bar in the set. 
Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2013 
Syntax
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Parameters
- barPositionIndex
 - Type: SystemInt32
An index between 0 and (NumberOfBarPositions-1). 
Return Value
The position of a bar in the set relative to the first position.Remarks
 The transform is a translation along the distribution path. It can be applied to the results of GetCenterlineCurves() to produce any bar in the rebar set. For barPositionIndex=0, the identity transform is always returned. 
Exceptions
| Exception | Condition | 
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| Autodesk.Revit.ExceptionsArgumentOutOfRangeException | barPositionIndex is not in the range [ 0, NumberOfBarPositions-1 ]. |