Start process and read output

// Retrieving the results and waiting until the process stops (running the process synchronously)
private void runSyncAndGetResults_Click(object sender, System.EventArgs e)
{
System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo(@"C:\listfiles.bat");
psi.RedirectStandardOutput = true;
psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
psi.UseShellExecute = false;
System.Diagnostics.Process listFiles;
listFiles = System.Diagnostics.Process.Start(psi);
System.IO.StreamReader myOutput = listFiles.StandardOutput;
listFiles.WaitForExit(2000);
if(listFiles.HasExited)
{
string output = myOutput.ReadToEnd();
MessageBox.Show(output);
}
}