A polyline annotation: an open polygon.
public sealed class PdfPolyLineAnnotation : PdfMarkupAnnotation
ISO 32000-2 §12.5.6.9, Table 181 (PDF 1.5).
kind:method, kind:property, kind:ctor. Press Esc to clear.EndLineEndingGets the line ending at the last point (LE, PDF 1.4); default 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.StartLineEndingGets the line ending at the first point (LE, PDF 1.4); default none.