title: How to notify property change for count of an ObservableCollection in windows phone 8?
body: <p>Let, I have an <code>ObservableCollection</code>. I m binding it's Count property with the Text property of a <code>TextBlock</code>. As one or more items added or deleted from the collection the Count get updated. As I know <code>ObservableCollection</code> implements both the <code>INotifyPropertyChanged</code> and <code>INotifyCollectionChanged</code>, so when the Count property is changed then my view should be updated. I am expecting the <code>TextBlock</code> that is bind with the Count property should show the updated count. But anyhow <code>NotifyPropertyChange</code> is not being called for the Count property!</p>
  
  <p>Here how I am binding the Text property with Count:</p>
  
  <pre><code>&lt;TextBlock Text="{Binding MyObservableCollection.Count}" /&gt;
  </code></pre>
  
  <p>Is there any way to notify property change for the Count property of an <code>ObservableCollection</code>?</p>