questions about Symfony 2.1.x

[rikiko2]

Hi,
I 'm writing a project with 2.0.x and I have a few question:
what is the difference between 2.0.x and 2.1.x?
how to pass from 2.0.x to 2.1.x?

Thank you in advance,
R.

[trsteel88]

https://github.com/symfony/symfony/blob ... ADE-2.1.md

[rodush]

Yep, that article only describes what have changed in the core framework and what should be changed in your existing code if it used any of described features.
But what about upgrading the whole version of symfony framework and other bundles? How to do that in a best way?