Update ObservableCollection without blinking
<p>Could someone help me, how can I update ObservableCollection, which is binded to ListView ItemSource, without blinking? When I do:</p>

<pre><code>Contacs = _contacs;
</code></pre>

<p>the whole ListView is blinking. I would like to search in ListView too, but always after replacing the old results with new one, the listview blinks.</p>