title: Linq: Difference between 2 DateTimes in TimeSpan
body: <p>I'm trying to do this:</p>
  
  <pre><code>Tickets.Where(t =&gt; (t.Date - myTicket.Date) &lt; TimeSpan.FromSeconds(120));
  </code></pre>
  
  <p>I'm getting the "DbArithmeticExpression arguments must have a numeric common type" error. How can I do this, considering that I need the difference in a TimeSpan?</p>
  
  <p>Thanks in advance.</p>