How to write to console app with hidden window

Question

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            _process = new Process();
            _process.StartInfo.FileName = @"//myconsolaeapp";
            _process.StartInfo.UseShellExecute = false;
            _process.EnableRaisingEvents = true;
            _process.StartInfo.CreateNoWindow = true;
            _process.StartInfo.RedirectStandardOutput = true;
            _process.OutputDataReceived += OutputHandler;
            //_process.Exited += (ErrorHandler);
            _process.SynchronizingObject = richTextBox1;
            _process.SynchronizingObject = richTextBox1;
            _process.Start();
            _process.BeginOutputReadLine();
            _process.WaitForExit();
        }

and other methods 

 

private void OutputHandler(Object source, DataReceivedEventArgs outLine)
       {

           if (!String.IsNullOrEmpty(outLine.Data))
           {
               richTextBox1.AppendText(outLine.Data + "\r\n");
               richTextBox1.ScrollToCaret();

           }
       }

 I have a textbox that once text is changed it is written to my hidden console window and updated in the tichtextbox1.

 

Can anybody give me some hints please