The target path for the export. 
   Namespace:   Autodesk.Revit.DB.Events  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2010 
Syntax
Remarks
 When several files are exported at the same time, 'Path' property will just report the directory instead of those full file names.