public PdfInkAnnotationFacade AddInkAnnotation(
    IList<IList<PdfPoint>> inks
)

Public Function AddInkAnnotation(
    inks As IList(Of IList(Of PdfPoint))
) As PdfInkAnnotationFacade

using (PdfDocumentProcessor processor = new PdfDocumentProcessor())
{
  // Load a document
  processor.LoadDocument("..\\..\\Document.pdf");

  // Access page properties
  PdfPageFacade pageFacade = processor.DocumentFacade.Pages[0];

  // Define ink vertices
  PdfPoint[] points = new PdfPoint[]
  {
      new PdfPoint(100, 100),
      new PdfPoint(120, 100),
      new PdfPoint(130, 110),
      new PdfPoint(130, 110),
      new PdfPoint(140, 100),
      new PdfPoint(150, 150)
  };

  List<IList<PdfPoint>> inks = new List<IList<PdfPoint>> { points };

  // Create an ink annotation
  PdfInkAnnotationFacade inkAnnotation = pageFacade.AddInkAnnotation(inks);
  inkAnnotation.Author = "Brian Zetc";
  inkAnnotation.BorderWidth = 1.0;

  // Save the result
  processor.SaveDocument("..\\..\\Result.pdf");
}

Using processor As New PdfDocumentProcessor()
  ' Load a document
  processor.LoadDocument("..\..\Document.pdf")

  ' Access page properties
  Dim pageFacade As PdfPageFacade = processor.DocumentFacade.Pages(0)

  ' Define ink vertices
  Dim point1 As New PdfPoint(100, 100)
  Dim point2 As New PdfPoint(110, 110)
  Dim point3 As New PdfPoint(120, 100)
  Dim point4 As New PdfPoint(130, 110)
  Dim point5 As New PdfPoint(140, 100)
  Dim point6 As New PdfPoint(150, 150)
  Dim points() As PdfPoint = { point1, point2, point3, point4, point5, point6 }

  Dim inks As New List(Of IList(Of PdfPoint))() From {points}

  ' Create an ink annotation
  Dim inkAnnotation As PdfInkAnnotationFacade = pageFacade.AddInkAnnotation(inks)
  inkAnnotation.Author = "Brian Zetc"
  inkAnnotation.BorderWidth = 1.0

  ' Save the result
  processor.SaveDocument("..\..\Result.pdf")
End Using