What does "multiple scopes" mean in when talking about MEF (Managed Extensibility Framework) and .NET 4.5?

Question

In What's new in .NET 4.5 microsoft says that MEF will now support "multiple scopes". What does this mean? I can't find documentation on that anywhere.

Answer 1

I belive you question is anwered fully in this blog: http://blogs.msdn.com/b/bclteam/archive/2011/12/19/sharing-with-compositionscopedefinition-in-mef2-alok.aspx