title: How can I register one singleton to different interfaces in unity, XML config?
body: <p>How to do it in code is explained here:
  <a href="https://stackoverflow.com/questions/1394650/unity-register-two-interfaces-as-one-singleton">Unity Register two interfaces as one singleton</a></p>
  
  <pre><code>_container.RegisterType&lt;EventService&gt;(new ContainerControlledLifetimeManager());
  _container.RegisterType&lt;IEventService, EventService&gt;();
  _container.RegisterType&lt;IEventServiceInformation, EventService&gt;();
  
  bool singleton = ReferenceEquals(_container.Resolve&lt;IEventService&gt;(),   _container.Resolve&lt;IEventServiceInformation&gt;());
  </code></pre>
  
  <p>How to do it in the XML config?</p>