How to create stamp annotation with barcode appearance in a PDF document using C# and VB.NET

using Syncfusion.Pdf;
using Syncfusion.Pdf.Barcode;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Interactive;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Barcode
Imports Syncfusion.Pdf.Interactive
Imports Syncfusion.Pdf.Graphics

//Creating a new PDF Document.
PdfDocument document = new PdfDocument();
//Add the margins.
document.PageSettings.Margins.All = 0;
//Adding a new page to a PDF document.
PdfPage page = document.Pages.Add();
//Initialize a new PdfCode39Barcode instance.
PdfCode39Barcode barcode = new PdfCode39Barcode();
//Set the height and text for barcode.
barcode.BarHeight = 45;
barcode.Text = "CODE39$";
//Convert the barcode to image.
Image barcodeImage = barcode.ToImage(new SizeF(180, 100));
//Creates a new pdf rubber stamp annotation.
RectangleF rectangle = new RectangleF(40, 60, 180, 100);
PdfRubberStampAnnotation rubberStampAnnotation = new PdfRubberStampAnnotation(rectangle, " Barcode Rubber Stamp Annotation");
rubberStampAnnotation.Appearance.Normal.Graphics.DrawImage(new PdfBitmap(barcodeImage), 0, 0, rectangle.Width, rectangle.Height);
rubberStampAnnotation.Text = "Barcode Properties Rubber Stamp Annotation";
//Adds annotation to the page.
page.Annotations.Add(rubberStampAnnotation);
//Save and closes the document.
document.Save("../../Barcode.pdf");
document.Close(true);

'Creating a new PDF Document.
Dim document As PdfDocument = New PdfDocument()
'Add the margins.
document.PageSettings.Margins.All = 0
'Adding a new page to a PDF document.
Dim page As PdfPage = document.Pages.Add()
'Initialize a new PdfCode39Barcode instance.
Dim barcode As PdfCode39Barcode = New PdfCode39Barcode()
'Set the height and text for barcode.
barcode.BarHeight = 45
barcode.Text = "CODE39$"
'Convert the barcode to image.
Dim barcodeImage As Image = barcode.ToImage(New SizeF(180, 100))
'Creates a new pdf rubber stamp annotation.
Dim rectangle As RectangleF = New RectangleF(40, 60, 180, 100)
Dim rubberStampAnnotation As PdfRubberStampAnnotation = New PdfRubberStampAnnotation(rectangle, " Barcode Rubber Stamp Annotation")
rubberStampAnnotation.Appearance.Normal.Graphics.DrawImage(new PdfBitmap(barcodeImage), 0, 0, rectangle.Width, rectangle.Height);
rubberStampAnnotation.Text = "Barcode Properties Rubber Stamp Annotation";
'Adds annotation to the page.
page.Annotations.Add(rubberStampAnnotation)
'Save and closes the document.
document.Save("../../Barcode.pdf")
document.Close(true)