My understanding is that the the 4.5.X runtime is actually an in-place upgrade to the 4.0 runtime. So in other words, it replaces 4.0.
But if I have applications on a server that target framework version 4.0, will they start using 4.5 framework features?
And more importantly, would it be considered good practice to upgrade my existing applications to my server runtime?
So going to each class library, MVC app, etc and changing the target framework to the corresponding version.
Is that required or considered best practice?