Multiple EntityManagers & DefaultManager

I have been working on a application that only has one entity manager. When I attempted to add another one (something that should be relatively easy) everything went Nuclear! My assumption that GetDefaultEntityManager was some sort of a attempted singleton pattern was way off. I don't even know why it has a generic parameter, it does not seem to use it O_o?

What is the intended usage pattern for working with multiple entity managers? If you look at the code everything just seems wrong. Entity Manager defines the following property in the base class:

public static EntityManager DefaultManager { get; set; }

But then it goes and generates this:

/// <summary>Gets the default manager. </summary>
public new static IdentityEntityManager DefaultManager
{
    get { return GetDefaultEntityManager<IdentityEntityManager>(); }
}