C# console app - print job vanishes in Windows 8 regardless of print driver used; works in Windows 7

Question

I have the following which sends a print file to a specific printer. It works perfectly in Windows 7, but not in Windows 8. The print job shows in the print queue until the print job is closed. Then the print job literally vanishes from the print
queue. This issue occurs with all print drivers, including generic text only. Conversely, I can still use the "winspool.drv" DLL directly under Windows 8 and it works. Please advise. Thank you.
Here is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Printing;
namespace PrinterLib
    public static class PrintToSpooler
        public static string SendFileToPrinter(string szPrinterName, string szFileName, string docName)
            try
                // Create the printer server and print queue objects
                //PrintQueue defaultPrintQueue = LocalPrintServer.GetDefaultPrintQueue();
                //PrintQueue mypq = new PrintServer().GetPrintQueue(szPrinterName);
                //using (var printq = defaultPrintQueue)
                using (var printq = new PrintServer().GetPrintQueue(szPrinterName))
                    using (PrintSystemJobInfo job = printq.AddJob(docName))
                        using (var memoryStream = new MemoryStream())
                            FileStream fs = new FileStream(szFileName, FileMode.Open, FileAccess.Read, FileShare.None);
                            fs.CopyTo(memoryStream);
                            fs.Close();
                            Byte[] myByteBuffer = memoryStream.ToArray();
                            // Write a Byte buffer to the JobStream and close the stream
                            job.JobStream.Write(myByteBuffer, 0, myByteBuffer.Length);
                            job.JobStream.Flush();
                    printq.Commit();
                return null;
            catch (Exception ex)
                return ex.Message;

Answer 1

Hello folks,
I have been facing the same problem until right now. All above suggested methods failed (as it did for Jeff0123) . But after long research on that issue I think I found the reason (but no proper solution yet).
MS Windows 8 and 2012 use a new printer driver generation based on XPS. Which means drivers like "generic text-only" won't work properly depending on the method the data is sent to the printer. In my case the
same way like Jeff0123 tried to access the printers.
See link http://support.microsoft.com/kb/2779300
One solution might be to use API calls. I have also found a site which shows an example project for thermal slip printing. The VB.NET source code there features a wrapper class for all API calls. The functions you find behave pretty similar to the ones of
the posted C# code example of Jeff0123. I did a small test so far and for my needs that works fine.
Although the page is in German you can find the mentioned class by searching for "Public
Class RawPrinter". Beside the comments the class methods are written in English. You find the class here: http://www.vbarchiv.net/tipps/tipp_2375-kassenbon-drucker-mit-vbnet-oder-c-per-esc-pos-befehle-ansprechen.html
Hope that might help for at least a few of you. So long!