System.Object
   GdPicture14.Annotations.Annotation
      GdPicture14.Annotations.AnnotationComment
      GdPicture14.Annotations.AnnotationCustom
      GdPicture14.Annotations.AnnotationEllipse
      GdPicture14.Annotations.AnnotationEmbeddedImage
      GdPicture14.Annotations.AnnotationFreeHand
      GdPicture14.Annotations.AnnotationFreeHandHighlighter
      GdPicture14.Annotations.AnnotationLine
         GdPicture14.Annotations.AnnotationLineArrow
         GdPicture14.Annotations.AnnotationRuler
      GdPicture14.Annotations.AnnotationPolygon
         GdPicture14.Annotations.AnnotationConnectedLines
         GdPicture14.Annotations.AnnotationFreeHandPolygon
         GdPicture14.Annotations.AnnotationPolyRuler
      GdPicture14.Annotations.AnnotationRectangle
      GdPicture14.Annotations.AnnotationRectangleHighlighter
      GdPicture14.Annotations.AnnotationRedaction
      GdPicture14.Annotations.AnnotationRubberStamp
         GdPicture14.Annotations.AnnotationLink
      GdPicture14.Annotations.AnnotationStickyNote
      GdPicture14.Annotations.AnnotationText

Reference

GdPicture.NET.14.API Assembly