System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
            startInfo.UseShellExecute = true;
            startInfo.Verb = "Printto";
            startInfo.CreateNoWindow = true;
            startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            startInfo.FileName = path + "pdfdoc.pdf";
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo = startInfo;
            p.Start();
            p.Close();
            p.Dispose();