Unity Register two interfaces as one singleton

Question

how do I register two different interfaces in Unity with the same instance... Currently I am using

        _container.RegisterType

        

Answer 1

Edit

After some feedback in the comments I've decided that Sven's answer is a much superior answer. Thanks to Chris Tavares for pointing out the technical merits.

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That's pretty much the only way to do it.

You could modify it slightly (I hate RegisterType with the same type for each generic parameter):

EventService es = _container.Resolve();
_container.RegisterInstance(es);
_container.RegisterInstance(es);

If one or more of your IoC children is going to request the concrete EventService type (hopefully not) you'd add one more RegisterInstance of type RegisterInstance. Hopefully you don't need that and all of the dependent objects are asking for an IEventService, rather than an EventService.

Hope this helps, Anderson