Returns the normal of plane in which the hook at end of bar with index barPositionIndex that is currently in Rebar. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2018 
Syntax
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Parameters
- end
 -  Type:  System Int32  
The end of bar. Should be 0 for start or 1 for end. 
- barPositionIndex
 -  Type:  System Int32  
An index between 0 and (GetNumberOfBars()-1). 
Return Value
The normal of plane in which the hook at end of bar with index barPositionIndex that is currently in Rebar.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | barPositionIndex is not in the range [ 0, GetNumberOfBars()-1 ]. -or- Invalid end. |