The family parameter label of the BaseArray. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
| C# | 
|---|
|  | 
| Visual Basic | 
|---|
|  | 
| Visual C++ | 
|---|
|  | 
Remarks
 The label associates the number of members of the array with a family parameter. A BaseArray only can be labeled in a family document and only can be labeled to a integer FamilyParameter. To unbind the family parameter, set this property to    a null reference (  Nothing  in Visual Basic)  . 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | Thrown when the family parameter's ParameterType is not ParameterType.Integer. | 
| Autodesk.Revit.Exceptions InvalidOperationException | Thrown when trying to label the BaseArray out of family document. |