Determine if a List contains elements from another List
<p>I have an object model <code>MyObject</code> that contains a list of long called <code>ObjectList</code>. I have another list called <code>TestList</code> that also contains longs and I want to determine if <code>TheObject.ObjectList</code> contains any elements that are in <code>TestList</code>.</p>

<p>I'm trying with something like this but it's not giving Count as an option.</p>

<pre><code>if (TheObject.ObjectList.Any(TestList).Count() &gt; 0) {...}
</code></pre>

<p>How should I rewrite this?
Thanks for your suggestions.</p>
