Indicates whether the family can be converted to face host based. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Parameters
- document
-  Type:  Autodesk.Revit.DB Document  
 The document.
- familyId
-  Type:  Autodesk.Revit.DB ElementId  
 The element id of the family.
Return Value
True if the family can be converted to face-based. Otherwise false, which will be returned if there any family instances exist in the project, the family is already face-based, or the family does not have a host. Also, false is returned if the family does not belong to one of the following categories:- OST_CommunicationDevices
- OST_DataDevices
- OST_DuctTerminal
- OST_ElectricalEquipment
- OST_ElectricalFixtures
- OST_FireAlarmDevices
- OST_LightingDevices
- OST_LightingFixtures
- OST_MechanicalEquipment
- OST_NurseCallDevices
- OST_PlumbingFixtures
- OST_SecurityDevices
- OST_Sprinklers
- OST_TelephoneDevices
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |