title: How to get BackSpace - with only numbers limit in textbox?
body: <p>I insert this on <code>KeyPress</code> event:</p>
  
  <pre><code>e.Handled = !Char.IsNumber(e.KeyChar);
  </code></pre>
  
  <p>But I don't have the <kbd>Backspace</kbd> key, how to fix it?</p>