GetManifestResourceStream ( '.pfx' ) PdfCertificate pdfCert = new PdfCertificate ( certificateStream, 'password123' ) //Creates a digital signature PdfSignature signature = new PdfSignature ( document, page, pdfCert, 'Signature' ) //Sets an image for signature field Stream imageStream = typeof ( MainPage ). Graphics //Creates a certificate instance from PFX file with private key Stream certificateStream = typeof ( MainPage ). Add () //Create PDF graphics for the page PdfGraphics graphics = page. Creates a new PDF document PdfDocument document = new PdfDocument () //Adds a new page PdfPageBase page = document. DrawImage ( signatureImage, 0, 0 ) //Saves and closes the document document. Reason = 'I am author of this document.' //Draws the signature image graphics. LocationInfo = 'Honolulu, Hawaii' signature. Bounds = new RectangleF ( new PointF ( 0, 0 ), signatureImage. Graphics //Creates a certificate instance from PFX file with private key PdfCertificate pdfCert = new PdfCertificate (, 'password123' ) //Creates a digital signature PdfSignature signature = new PdfSignature ( document, page, pdfCert, 'Signature' ) //Sets an image for signature field PdfBitmap signatureImage = new PdfBitmap ( ) //Sets signature information signature.

Add signature in pdf