Is there a difference between setting Session.Timeout or adding it to the web.config?

Question

In ASP.NET there are two ways of setting the session timeout.

In the code:

Session.Timeout = 20

or In web.config

<sessionState timeout="20"/>

But what I don't understand is the difference between the two forms.

Are there any?

Answer 1

The value in web.config is a (default) timeout value for all sessions. In code you are able to give specific sessions a different timeout.