As the name implies, Managed Extensibility Framework is a framework for extending .NET applications. In a recent Channel 9 interview Oleg Lvovitch and Kevin Ransom talked about the history of MEF and what’s planed for version 2.
The actual version number for .NET 4.5 assemblies is 4.0.30319. If that looks familiar it is because that is also the version number for .NET 4.0 assemblies. Much to the chagrin of developers, Microsoft will be updating core assemblies “in-place” despite the fact that it includes breaking changes.
C# and VB.NET will soon be getting new features like Windows Runtime Support, Asynchronous Methods, Caller Info attributes and more. Also, compiler will get APIs which will expose what the compiler knows about the code to the IDE and the developers.
In keeping with their annual cadence, Microsoft has begun work on the next version of ASP.NET MVC. Areas of emphasis include smoothing out the development and deployment workflow, sharing more features with Web Forms, improving AJAX support, and offering a better story for HTML 5 on mobile and tablet devices.