An attribute object owned by UserProperties: application-specific properties of an element, such as those of a CAD object.
public sealed class PdfUserPropertiesAttributes : PdfAttributeObject
ISO 32000-2 §14.7.6.4, Tables 361 and 362. The document's MarkInfo UserProperties shall be true when an element
carries user properties (UserProperties). A P entry that is not a dictionary, or lacks
N or V, is left out of Properties.
kind:method, kind:property, kind:ctor. Press Esc to clear.PropertiesGets the user properties (P), in order.