title: what is notifycollectionchangedaction reset value
body: <p>I have an observable collection...<code>SelectableDataContext&lt;T&gt;</code>..And in the generic class <code>SelectableDataContext&lt;T&gt;</code> is...having two private member variables  </p>
  
  <ol>
  <li>Private T item.  </li>
  <li>Private bool isSelected. </li>
  </ol>
  
  <p>When the IsSelected property changes...My collection's changed property is not firing .</p>
  
  <p>I think it should fire...because it's <code>Reset</code> in <code>INotifyCollectionChangedAction</code>.</p>