How to print the PDF document containing form fields

PdfViewerControl viewer = new PdfViewerControl();
 
//Create new instance of PdfLoadedDocument with the form field document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(@"..\..\Data\Form.pdf");
            
//Flatten the form fields and resaving
loadedDocument.Form.Flatten = true;
loadedDocument.Save();
 
//Load the resaved document in viewer
viewer.Load(loadedDocument);
 
// Initialize print dialog and silent print the document
PrintDialog dialog = new PrintDialog();
 
dialog.Document = viewer.PrintDocument;
dialog.Document.Print();