how to read an output message from Process [duplicate]

I have a C# application which calls a exe file. Below the code I used for calling the process:

System.Diagnostics.Process proc = new System.Diagnostics.Process();
proc.EnableRaisingEvents = false;
proc.StartInfo.FileName = "ContasillabeGame";
proc.StartInfo.Arguments = numeroSillabe + " " + numeroToken;
proc.OutputDataReceived += new DataReceivedEventHandler(OutputToTextArea);
proc.Start();
// Start the asynchronous read of the sort output stream.
proc.WaitForExit();

And here the method used for getting data retrieved from the process.

private void OutputToTextArea(object sendingProcess, DataReceivedEventArgs outLine)
{
    // Collect the sort command output. 
    if (!String.IsNullOrEmpty(outLine.Data))
    {
        System.Console.WriteLine(outLine.Data);
    }
}

With this code i launch app ContasillabeGame but i don't have any result from that app. Why? For send message from ContasillabeGame i use this code

Sample code for send message:

System.Console.WriteLine("pippo");