title: TextBox.AppendText() not autoscrolling
body: <p>I tried the following to get my Textbox text to automatically scroll:</p>
  
  <p>The steps I am using are pretty trivial:</p>
  
  <ol>
  <li>Drag textbox onto form.</li>
  <li>Change textbox to be multiline.</li>
  <li>Add vertical scroll.</li>
  <li>Use AppendText() to add text to the textbox.</li>
  </ol>
  
  <p>The text does not automatically scroll, despite trying to solutions mentioned here:</p>
  
  <p><a href="https://stackoverflow.com/questions/898307/how-do-i-automatically-scroll-to-the-bottom-of-a-multiline-text-box">How do I automatically scroll to the bottom of a multiline text box?</a></p>
  
  <p>What could cause this and how do I fix it?</p>
  
  <p>UPDATE:  If I create a button and use it to call AppendText() I get the desired behavior.  However, if I try to call AppendText from the form's constructor or Load() event then I get the appended text but the TextBox does not scroll.  This is NOT a duplicate question as I haven't seen anyone post this problem in the past.</p>