c# - Changing printer settings -

Then I have a code and when the dialog opens, it shows that the printer settings change to print two-sided , But when I right click and print it does not print double-side, but when I manually select double-side, it prints correctly. Any idea what might be the case? Thank you in advance for your help. Using ASP.NET Web Application

  (PrintDialog pd = new PrintDialog ()) {PrinterSettings ps = new PrinterSettings (); Ps.duplex = Duplex Horizontal; Pd.PrinterSettings = ps; // pd.UseEXDialog = True; If (pd.ShowDialog () == DialogResult.OK) {ProcessStartInfo info = new ProcessStartInfo (filePath); Info.Verb = "print"; Info.CreateNoWindow = True; Info.WindowStyle = Process WindowStyle.Hidden; Process.Start (info); }}    
 
 
 You can check it  PrinterSettings.CanDuplex  Property Just set  
  printer settings settings = new printer settings ();   
 and check whether your printer supports it or not.  
 
 This property indicates whether the printer supports double-sided printing.  
 This printer returns  true  if the printer supports double-sided printing; Otherwise,  false .   
 You can just do this:  
  printed pd = new printDialog (); Print document MyPrintDocument = new print document (); MyPrintDocument.PrintPage + = New PrintPage Event Handler (PrintPage Event); Pd.PrinterSettings.PrintRange = PrintRange.AllPages; MyPrintDocument.PrinterSettings.PrintRange = PrintRange.AllPages; MyPrintDocument.Print ();   
 Where  PrintPageEvent  at  print () ;