AutoFixture: Configuring an Open Generics Specimen Builder

I have an object model that uses Open Generics (Yes, yes, now I have two problems; that's why I'm here :) :-

public interface IOGF<T>
{
}

class C
{
}

class D
{
    readonly IOGF<C> _ogf;

    public D( IOGF<C> ogf )
    {
        _ogf = ogf;
    }
} 

I'm trying to get AutoFixture to generate Anonymous instances of D above. However, on its own, AutoFixture doesn't have a built in strategy for building an IOGF<> and hence we observe:

public class OpenGenericsBinderDemo
{
    [Fact]
    public void X()
    {
        var fixture = new Fixture();

        Assert.Throws<Ploeh.AutoFixture.ObjectCreationException>( () =>
            fixture.CreateAnonymous<D>() );
    }

The underlying message is:

Ploeh.AutoFixture.ObjectCreationException : AutoFixture was unable to create an instance from IOGF`1[C], most likely because it has no public constructor, is an abstract or non-public type.

I'm happy to provide it a concrete implementation:

public class OGF<T> : IOGF<T>
{
    public OGF( IX x )
    {
    }
}

public interface IX
{
}

public class X : IX
{
}

And an associated binding:

fixture.Register<IX,X>();

How do I (or should I even look at the problem that way??) make the following test pass?

public class OpenGenericsLearning
{
    [Fact]
    public void OpenGenericsDontGetResolved()
    {
        var fixture = new Fixture();
        fixture.Inject<IX>( fixture.Freeze<X>() );

        // TODO register or do something that will provide 
        //      OGF<C> to fulfill D's IOGF<C> requirement

        Assert.NotNull( fixture.CreateAnonymous<D>());
    }
}

(There are discussions and issues around this on the codeplex site - I just needed to a quick im