C#

....
if (string.IsNullOrEmpty(AcrobatReaderPath))
{
  //AcrobatReaderPath = @"C:\Program Files\Adobe\Acrobat 7.0\Reader\AcroRd32.exe";
  AcrobatReaderPath = @"C:\Programme\Adobe\Reader 8.0\Reader\AcroRd32.exe";
  //AcrobatReaderPath = @"C:\Program Files\Adobe\Reader 8.0\Reader\AcroRd32.exe";
}
logger.Info("AcrobatReaderPath = " + AcrobatReaderPath);
System.Diagnostics.ProcessStartInfo startInfo = new ProcessStartInfo();
logger.Info("1");
startInfo.Arguments = "/h /t \"" + pdfFileName + "\" \"" + printerName + "\"";
logger.Info("2");
startInfo.FileName = AcrobatReaderPath;
logger.Info("3");
startInfo.UseShellExecute = true;
logger.Info("4");
startInfo.CreateNoWindow = true;
logger.Info("5");
startInfo.RedirectStandardOutput = false; // was true
logger.Info("6");
startInfo.UseShellExecute = false;
logger.Info("7");
System.Diagnostics.Process process = Process.Start(startInfo);
logger.Info("8");
....