System.Diagnostics.ProcessStartInfo Info = new System.Diagnostics.ProcessStartInfo();

        //设置外部程序名  
        Info.FileName = "1.txt";

        //设置外部程序工作目录为   
        Info.WorkingDirectory = @"D:\test\";

        //最小化方式启动
        Info.WindowStyle = System.Diagnostics.ProcessWindowStyle.Minimized;

        //声明一个程序类  
        System.Diagnostics.Process Proc;

        try
        {
            Proc = System.Diagnostics.Process.Start(Info);
            System.Threading.Thread.Sleep(500);
        }
        catch (System.ComponentModel.Win32Exception)
        {
            
            return;
        }