Identifies if the input category id can be assigned as the new category for this family. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2015 
Syntax
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Parameters
- categoryId
-  Type:  Autodesk.Revit.DB ElementId  
 The category id.
Return Value
True if the input category id can be assigned as the new category for this family, false otherwise.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |