PdfPolygonAnnotation public class PdfPolygonAnnotation : PdfAnnotation Documentation public string Author { get; set; } public PdfBorderEffect BorderEffect { get; set; } public DateTime ModifiedDate { get; set; } public string Subject { get; set; } public PointF[] Vertices { get; set; } public PdfPolygonAnnotation(PdfPageBase page, PointF[] points)