Sets the Layout Rule property of rebar set to FixedNumber. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2009 
Syntax
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Parameters
- numberOfBarPositions
 -  Type:  System Int32  
The number of bar positions in rebar set 
- arrayLength
 -  Type:  System Double  
The distribution length of rebar set 
- barsOnNormalSide
 -  Type:  System Boolean  
Identifies if the bars of the rebar set are on the same side of the rebar plane indicated by the normal 
- includeFirstBar
 -  Type:  System Boolean  
Identifies if the first bar in rebar set is shown 
- includeLastBar
 -  Type:  System Boolean  
Identifies if the last bar in rebar set is shown 
Remarks
 When changing the layout rule to FixedNumber, you must also simultaneously set NumberOfBarPositions, SetLength, BarsOnNormalSide, IncludeFirstBar, and IncludeLastBar properties. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | the number of bar positions numberOfBarPositions is less than 1 or more than 1002. -or- the set length arrayLength isn't acceptable. | 
| Autodesk.Revit.Exceptions DisabledDisciplineException | None of the following disciplines is enabled: Structural. | 
| Autodesk.Revit.Exceptions InapplicableDataException | This Rebar is an instance of a spiral or multiplanar shape. | 
| Autodesk.Revit.Exceptions InvalidOperationException | This method applies only to shape driven rebar. |