Can I use LINQ with .net Framework version 4.5? : <p>Can anyone tell me if I will be able to use LINQ after upgrading from 4.0 to 4.5?  </p>

<p>My project currently targets the 4.0 Framework. I need to upgrade to version 4.5 or later to be able to use the Braintree payment processing api.  I've had problems in the past after an upgrade, though they may have been after upgrading from 3.5.</p>
