title: Fast performing and thread safe observable collection
body: <p><code>ObservableCollection</code>s raise notifications for each action performed on them. Firstly they dont have bulk add or remove calls, secondly they are not thread safe.</p>
  
  <p>Doesn't this make them slower? Cant we have a faster alternative? Some say <code>ICollectionView</code> wrapped around an <code>ObservableCollection</code> is fast? How <strong>true</strong> is this claim.</p>