title: How can I retrieve first item from a Collection?
body: <p>I dont know how to retrieve first Item from this collection :</p>
  
  <pre><code>IGrouping&lt;string, Plantilla&gt; groupCast = group as System.Linq.IGrouping&lt;string, Plantilla&gt;;
  </code></pre>
  
  <p>I also tryed : </p>
  
  <pre><code>IGrouping&lt;string, Plantilla&gt; firstFromGroup = groupCast.FirstOrDefault();
  </code></pre>
  
  <p>but not works cause and explicit conversion already exist </p>