System.Object
   System.Collections.ObjectModel.Collection<T>
      Xfinium.Pdf.Annotations.Pdf3DCrossSectionCollection
      Xfinium.Pdf.Annotations.Pdf3DNodeCollection
      Xfinium.Pdf.Annotations.Pdf3DViewCollection
      Xfinium.Pdf.Annotations.PdfAnnotationCollection
      Xfinium.Pdf.Annotations.PdfRichMediaAssetCollection
      Xfinium.Pdf.Annotations.PdfRichMediaConfigurationCollection
      Xfinium.Pdf.Annotations.PdfRichMediaInstanceCollection
   Xfinium.Pdf.Annotations.Pdf3DAnimation
   Xfinium.Pdf.Annotations.Pdf3DBackground
   Xfinium.Pdf.Annotations.Pdf3DCrossSection
   Xfinium.Pdf.Annotations.Pdf3DEntity
      Xfinium.Pdf.Annotations.Pdf3DActivation
   Xfinium.Pdf.Annotations.Pdf3DLightingScheme
   Xfinium.Pdf.Annotations.Pdf3DNode
   Xfinium.Pdf.Annotations.Pdf3DProjection
   Xfinium.Pdf.Annotations.Pdf3DRendering
   Xfinium.Pdf.Annotations.Pdf3DStream
   Xfinium.Pdf.Annotations.Pdf3DView
   Xfinium.Pdf.Annotations.PdfAnnotation
      Xfinium.Pdf.Annotations.Pdf3DAnnotation
      Xfinium.Pdf.Annotations.PdfLinkAnnotation
      Xfinium.Pdf.Annotations.PdfMarkupAnnotation
         Xfinium.Pdf.Annotations.PdfCircleAnnotation
         Xfinium.Pdf.Annotations.PdfFileAttachmentAnnotation
         Xfinium.Pdf.Annotations.PdfFreeTextAnnotation
         Xfinium.Pdf.Annotations.PdfInkAnnotation
         Xfinium.Pdf.Annotations.PdfLineAnnotation
         Xfinium.Pdf.Annotations.PdfPolylineAnnotation
            Xfinium.Pdf.Annotations.PdfPolygonAnnotation
         Xfinium.Pdf.Annotations.PdfRedactionAnnotation
         Xfinium.Pdf.Annotations.PdfRubberStampAnnotation
         Xfinium.Pdf.Annotations.PdfSoundAnnotation
         Xfinium.Pdf.Annotations.PdfSquareAnnotation
         Xfinium.Pdf.Annotations.PdfTextAnnotation
         Xfinium.Pdf.Annotations.PdfTextMarkupAnnotation
      Xfinium.Pdf.Annotations.PdfRichMediaAnnotation
      Xfinium.Pdf.Annotations.PdfScreenAnnotation
      Xfinium.Pdf.Forms.PdfFieldWidget
         Xfinium.Pdf.Forms.PdfCheckWidget
            Xfinium.Pdf.Forms.PdfCheckBoxWidget
            Xfinium.Pdf.Forms.PdfRadioButtonWidget
         Xfinium.Pdf.Forms.PdfComboBoxWidget
         Xfinium.Pdf.Forms.PdfListBoxWidget
         Xfinium.Pdf.Forms.PdfPushButtonWidget
         Xfinium.Pdf.Forms.PdfSignatureWidget
         Xfinium.Pdf.Forms.PdfTextBoxWidget
   Xfinium.Pdf.Annotations.PdfFileAttachmentAnnotationName
   Xfinium.Pdf.Annotations.PdfRichMediaActivation
   Xfinium.Pdf.Annotations.PdfRichMediaAsset
   Xfinium.Pdf.Annotations.PdfRichMediaContent
   Xfinium.Pdf.Annotations.PdfRichMediaDeactivation
   Xfinium.Pdf.Annotations.PdfRubberStampAnnotationName
   Xfinium.Pdf.Annotations.PdfSoundAnnotationName
   Xfinium.Pdf.Annotations.PdfTextAnnotationName
   Xfinium.Pdf.PdfContentStreamContainer
      Xfinium.Pdf.Graphics.PdfFormXObject
         Xfinium.Pdf.Annotations.PdfAnnotationAppearance

Reference

XFINIUM.PDF Library