Problem with printing PDFs from C# Forms application

    public class Pdf
    {
        public Boolean PrintPDFs(string pdfFileName)
        {
            try
            {
                ProcessStartInfo info = new ProcessStartInfo();
                info.Verb = "print";
                info.FileName = pdfFileName;
                info.CreateNoWindow = true;
                info.WindowStyle = ProcessWindowStyle.Hidden;

                Process p = new Process();
                p.StartInfo = info;
                p.Start();

                System.Threading.Thread.Sleep(10000);
                if (false == p.CloseMainWindow())
                {
                    KillAdobe("AcroRd32");
                }
                   
                return true;

            }
            catch (Exception ex)
            {
                File_operations logDetail = new File_operations();
                logDetail.WriteToLogFile(ex.Message);
                return false;
            }
        }
        private static bool KillAdobe(string name)
        {
            foreach (Process clsProcess in Process.GetProcesses().Where(
                         clsProcess => clsProcess.ProcessName.StartsWith(name)))
            {
                clsProcess.Kill();
                return true;
            }
            return false;
        }
    }