title: LINQ to SQL sum of decimal values
body: <p>I can't figure out how to do a simple sum of decimal values.</p>
  
  <pre><code>Table&lt;StaffTime&gt; times = ctx.GetTable&lt;StaffTime&gt;();
  
  var query = from t in times
              select new 
              {
                 t.Hours.Sum()
              }
  </code></pre>
  
  <p>Isn't Sum an extension method? What am I missing?</p>
  
  <p>Bob</p>