(Optional; PDF 1.5) An optional content group or optional content membership dictionary (see 8.11, “Optional Content”) specifying the optional content properties for the annotation. Before the annotation is drawn, its visibility shall be determined based on this entry as well as the annotation flags specified in the F entry (see 12.5.3, “Annotation Flags”). If it is determined to be invisible, the annotation shall be skipped, as if it were not in the document.

public const string OC

Public Const OC As String

public:
literal String^ OC