![](dotnetdiagramimages/DS_Documents_Pdf_GrapeCity_Documents_Pdf_Layers_OptionalContentMembership.png)
'宣言 Public Class OptionalContentMembership Inherits OptionalContentIdentifier Implements GrapeCity.Documents.Pdf.Spec.IPdfDict, GrapeCity.Documents.Pdf.Spec.IPdfObject
public class OptionalContentMembership : OptionalContentIdentifier, GrapeCity.Documents.Pdf.Spec.IPdfDict, GrapeCity.Documents.Pdf.Spec.IPdfObject
System.Object
GrapeCity.Documents.Pdf.Wrappers.PdfWrapperBase
GrapeCity.Documents.Pdf.Wrappers.PdfWrapper<T>
GrapeCity.Documents.Pdf.Wrappers.PdfDictWrapper
GrapeCity.Documents.Pdf.Layers.OptionalContentIdentifier
GrapeCity.Documents.Pdf.Layers.OptionalContentMembership