Gets collection of properties stored in this property list. 
   Namespace:   Autodesk.Revit.Utility  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2014 
Syntax
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Remarks
 All the properties in the list are of the same AssetPropertyType. The AssetPropertyType can only be APT_Integer, APT_DoubleArray4d, APT_Float or APT_Double.