title: Does End Using close an open SQL Connection
body: <p>If I wrap a SQLConnection in a Using, should I close it or does the end using handle it?</p>
  
  <pre><code>using cn as new system.data.sqlclient.sqlconnection()
      cn.open
      '{do a bunch of other stuff with commands and datareaders here}
      cn.close 'Do I need this?
  end using 
  </code></pre>