C# print pdf-files + close Adobe Reader

using System.Diagnostics;

                ProcessStartInfo info = new ProcessStartInfo();
                info.Verb = "print";
                info.FileName = "C:\\Temp\\abcde.pdf";
                info.CreateNoWindow = true;
                info.WindowStyle = ProcessWindowStyle.Hidden;

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

                p.WaitForInputIdle();
                System.Threading.Thread.Sleep(3000);
                if (false == p.CloseMainWindow()) //if (!p.CloseMainWindow())
                    p.Kill();