Checks whether the family type id is valid for the give family category. 
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since:  2015 
Syntax
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Parameters
- familyCategoryId
 - Type: Autodesk.Revit.DBElementId
The family category id. 
- familyTypeId
 - Type: Autodesk.Revit.DBElementId
The default family type id. 
Return Value
True if the family type id is valid for the give family category, false otherwise.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.ExceptionsArgumentNullException | A non-optional argument was null |