PDFsharp & MigraDoc Foundation

Unable to get rubberstamp to produce anything but a rectangle in the middle of the page.

Here's the code:

] PdfDocument document = new PdfDocument();

// Create an empty page
PdfPage page = document.AddPage();

// Get an XGraphics object for drawing
XGraphics gfx = XGraphics.FromPdfPage(page);

// Create a font
XFont font = new XFont("Verdana", 20, XFontStyle.BoldItalic);

PdfRubberStampAnnotation rsAnnot = new PdfRubberStampAnnotation();
rsAnnot.Icon = PdfRubberStampAnnotationIcon.TopSecret;
rsAnnot.Flags = PdfAnnotationFlags.ReadOnly;
rsAnnot.Opacity = .1;

XRect rect = gfx.Transformer.WorldToDefaultPage(new XRect(new XPoint(100, 400), new XSize(350, 150)));
rsAnnot.Rectangle = new PdfRectangle(rect);

// Add the rubber stamp annotation to the page
page.Annotations.Add(rsAnnot);

const string filename = "rubberStamp.pdf";
document.Save(filename);
// ...and start a viewer.
Process.Start(filename);

Thanks