var inputFile = System.IO.Path.Combine(dataDir, "input.pdf");
var viewer = new Aspose.Pdf.Facades.PdfViewer();
viewer.BindPdf(inputFile);
viewer.AutoResize = true;
viewer.AutoRotate = true;
viewer.PrintPageDialog = false;
var ps = new Aspose.Pdf.Printing.PrinterSettings();
var pgs = new Aspose.Pdf.Printing.PageSettings();
var prtdoc = new System.Drawing.Printing.PrintDocument();
// Set printer name
ps.PrinterName = prtdoc.PrinterSettings.PrinterName;
// Set PageSize (if required)
pgs.PaperSize = Aspose.Pdf.Printing.PaperSizes.A4;
// Set PageMargins (if required)
pgs.Margins = new Aspose.Pdf.Devices.Margins(0, 0, 0, 0);
// Print document using printer and page settings
viewer.PrintDocumentWithSettings(pgs, ps);
// Close the PDF file after priting
viewer.Close();