c# 调用CMD不显窗口

private  void creatProcess(Process p)
        {
            p.StartInfo.FileName =  " cmd.exe ";
            p.StartInfo.UseShellExecute =  false;
            p.StartInfo.RedirectStandardInput =  true;
            p.StartInfo.RedirectStandardOutput =  true;
            p.StartInfo.CreateNoWindow =  true;
            p.Start();
        }