static void Main()
{
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Create a font
XFont font = new XFont("Verdana", 14);
// Create a page
PdfPage page = document.AddPage();
XGraphics gfx = XGraphics.FromPdfPage(page);
// Create a PDF text annotation
PdfTextAnnotation textAnnot = new PdfTextAnnotation();
textAnnot.Title = "This is the title";
textAnnot.Subject = "This is the subject";
textAnnot.Contents = "This is the contents of the annotation.\rThis is the 2nd line.";
textAnnot.Icon = PdfTextAnnotationIcon.Note;
gfx.DrawString("The first text annotation", font, XBrushes.Black, 30, 50, XStringFormats.Default);
// Convert rectangle form world space to page space. This is necessary because the annotation is
// placed relative to the bottom left corner of the page with units measured in point.
XRect rect = gfx.Transformer.WorldToDefaultPage(new XRect(new XPoint(30, 60), new XSize(30, 30)));
textAnnot.Rectangle = new PdfRectangle(rect);
// Add the annotation to the page
page.Annotations.Add(textAnnot);
// Create another PDF text annotation which is open and transparent
textAnnot = new PdfTextAnnotation();
textAnnot.Title = "Annotation 2 (title)";
textAnnot.Subject = "Annotation 2 (subject)";
textAnnot.Contents = "This is the contents of the 2nd annotation.";
textAnnot.Icon = PdfTextAnnotationIcon.Help;
textAnnot.Color = XColors.LimeGreen;
textAnnot.Opacity = 0.5;
textAnnot.Open = true;
gfx.DrawString("The second text annotation (opened)", font, XBrushes.Black, 30, 140, XStringFormats.Default);
rect = gfx.Transformer.WorldToDefaultPage(new XRect(new XPoint(30, 150), new XSize(30, 30)));
textAnnot.Rectangle = new PdfRectangle(rect);
// Add the 2nd annotation to the page
page.Annotations.Add(textAnnot);
// Create a so called rubber stamp annotion. I'm not sure if it is useful, but at least
// it looks impressive...
PdfRubberStampAnnotation rsAnnot = new PdfRubberStampAnnotation();
rsAnnot.Icon = PdfRubberStampAnnotationIcon.TopSecret;
rsAnnot.Flags = PdfAnnotationFlags.ReadOnly;
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);
// PDF supports some more pretty types of annotations like PdfLineAnnotation, PdfSquareAnnotation,
// PdfCircleAnnotation, PdfMarkupAnnotation (with the subtypes PdfHighlightAnnotation, PdfUnderlineAnnotation,
// PdfStrikeOutAnnotation, and PdfSquigglyAnnotation), PdfSoundAnnotation, or PdfMovieAnnotation.
// If you need one of them, feel encouraged to implement it. It is quite easy.
// Save the document...
const string filename = "Annotations_tempfile.pdf";
document.Save(filename);
// ...and start a viewer.
Process.Start(filename);
}