title: Closing connections explicitly in Entity Framework
body: <p>Reading the microsoft documentation <a href="http://msdn.microsoft.com/en-us/library/bb738684.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/bb738684.aspx</a> I see they explicitly open and close the connection</p>
  
  <pre><code>using (EntityConnection conn = new EntityConnection("name=AdventureWorksEntities"))
  { 
      conn.Open();
      ...
      conn.Close();
  }
  </code></pre>
  
  <p>why is this necessary?</p>