title: LINQ Select Distinct Count in Lambda form
body: <p>Given a linq expression of an object collection 'items' such as this:</p>
  
  <pre><code>var total = (from item in items select item.Value).Distinct().Count()
  </code></pre>
  
  <p>Is it possible to convert this to use linq functions/lambdas:</p>
  
  <pre><code>items.Select(???).Distinct().Count()
  </code></pre>