private static void PrintXps()
      {
         var printers = new LocalPrintServer().GetPrintQueues(new[] { EnumeratedPrintQueueTypes.Local, EnumeratedPrintQueueTypes.Connections });
         PrintQueue defaultPrinter = LocalPrintServer.GetDefaultPrintQueue();
         PrintQueue printerToUse = printers.FirstOrDefault(p => p.Name.Contains("PDFCreator")) ?? defaultPrinter; // Use PDFCreator if available.

         XpsDocumentWriter writer = PrintQueue.CreateXpsDocumentWriter(printerToUse);
         var xpsDoc = new XpsDocument("wpf_printing_raster_test.xps", FileAccess.Read);
         var docSeq = xpsDoc.GetFixedDocumentSequence();
         writer.Write(docSeq);
      }