visual studio failed signature validation

Graphics //Creates a certificate instance from PFX file with private key FileStream certificateStream = new FileStream ( 'PDF.pfx', FileMode. Creates a new PDF document PdfDocument document = new PdfDocument () //Adds a new page PdfPageBase page = document. Refer to the PDF/UWP section for respective code samples Save ( stream, 'Output.pdf' ) Close ( true ) //Save the stream as PDF document file in local machine. SaveAsync ( stream ) //Close the document document. DrawImage ( signatureImage, 0, 0 ) //Save the PDF document to stream MemoryStream stream = new MemoryStream () await 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. GetManifestResourceStream ( '.jpg' ) PdfBitmap signatureImage = new PdfBitmap ( imageStream ) //Sets signature information signature. 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 ).

Visual studio failed signature validation