title: RichTextBox does not constantly update when used as text status display
body: <p>I'm trying to use a RichTextBox as a status display but it is not updating every time I append to the text of the RichTextBox. A regular multiline TextBox will update everytime new text is appended to it, but I would prefer to use the RichTextBox. Is there some sort of property that needs to be set to see the updates?</p>
  
  <p><strong>UPDATE:</strong>
  Also, how would I automatically make it scroll down every a message is displayed?</p>
  
  <p>Like I said, if I replace the RichTextBox with a TextBox, I can see each line of the messages as they are getting written out and it will also automatically scroll down to the bottom to display the latest text added.</p>
  
  <pre><code>void UpdateStatus(string textMessage)
  {
    if (InvokeRequired)
    {
      BeginInvoke(new MethodInvoker(() =&gt; UpdateStatus(textMessage)));
      return;
    }
  
    richTextBox.AppendText(textMessage + Environment.NewLine);
  }
  </code></pre>