A polygon annotation: a closed polygon.
public sealed class PdfPolygonAnnotation : PdfMarkupAnnotation
ISO 32000-2 §12.5.6.9, Table 181 (PDF 1.5).
kind:method, kind:property, kind:ctor. Press Esc to clear.BorderEffectGets the border effect (BE, PDF 1.5), or null for none.InteriorColorGets or sets the interior colour (IC, PDF 1.4), or null for none; setting null removes it, and the appearance is kept until RegenerateAppearance().MeasureGets the measure dictionary giving the scale and units of the annotation (Measure, PDF 1.7), as stored, or null.PathGets the path (Path, PDF 2.0): arrays of 2 numbers (the start point, then straight segments) or 6 (a cubic Bézier curve's two control points and end point); null when absent.