title: Remove children from Panel only if are of type T
body: <p>I have a WPF <code>Panel</code> (like <code>Canvas</code> for example) and I want to remove its <code>Children</code> only if these children are of type <code>T</code>, for example all of type <code>Button</code>.  </p>
  
  <p>How can I do this?  Can I use LINQ?</p>