The first version of the Managed Extensibility Framework (MEF) was released as part of .NET 4 and with .NET 4.5 we see the release of MEF 2.0. The MEF team has added a number of new features that will be the focus of this chapter. These features include, but are not limited to, improved lifetime management, convention-based parts registration and, via NuGet, a new lightweight composition engine for web and Windows 8 apps.
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