aspose.words.properties.DocumentPropertyCollection class. Base class For [BuiltInDocumentProperties](../builtindocumentproperties/) and [CustomDocumentProperties](../customdocumentproperties/) collections...aspose.words.properties.DocumentPropertyCollection class. Base class for [BuiltInDocumentProperties](../builtindocumentproperties/) and [CustomDocumentProperties](../customdocumentproperties/) collections