title: Winforms - can't resize when adding textbox
body: <p>I'm putting together a simple winforms app, which consists on 1 form and a textbox.
  I want to have the textbox scale in width when the form is scaled by the user.</p>
  
  <p>By default the textbox is a fixed width and anchored at the top &amp; left. The form scales ok, but not the textbox.</p>
  
  <p>If I apply left, top &amp; right anchor to the textbox it only scales the textbox &amp; form up and I can't shrink it.</p>
  
  <p>Do I need to dynamically set the width of the textbox to that of the form?</p>