title: Using CollectionAssert.Contains against a collection
body: <p>I want to write something like:</p>
  
  <pre><code>var list = new List&lt;int&gt;(){1,2,3};
  var bigList = new List&lt;int&gt;(){1,2,3,4,5,6,7,8,9};
  
  CollectionAssert.Contains(bigList, list);
  </code></pre>
  
  <p>I can get an error similar to:</p>
  
  <pre><code> Expected: collection containing &lt; 1,2,3 &gt;
   But was:  &lt; 1,2,3,4,5,6,7,8,9 &gt;
  </code></pre>
  
  <p>Is it possible to use the contains method against another collection?</p>