title: Return a count with linq-to-sql
body: <p>I want to return a count of new users since a specific date.</p>
  
  <p>Users table has: UserID, username, dateJoined.</p>
  
  <pre><code>SELECT COUNT(USERID)
  FROM Users
  where dateJoined &gt; @date
  </code></pre>
  
  <p>How would this look in linq-to-sql?</p>
  
  <p>Can you use the keyword COUNT?</p>