Export this property set library to an external, XML-based file. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Parameters
- fileName
-  Type:  System String  
 Name of the file to write.
Return Value
True if the export succeeded, otherwise false.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions InvalidPathArgumentException | The folder does not exist. |