re:
!> My question is: i don't use session variables (like e.g. Session("mysessionvar")).
!> Is that the only way to use session state, or there are other ways?

The purpose of keeping track of session state is to enable the use of session variables.

If you don't need to set session variables, you can save resources by disabling it.

The problem is that, if you do that, a new Session.SessionID will be created
every time a single page is refreshed in one browser session.

To avoid that, use url munging, by setting "cookieless" to "true" in web.config.

<sessionState mode="Off" cookieless="true" timeout="20" />

If you don't need to track someone's session by using Session.SessionID,
though, you can disregard setting "cookieless" to "true" in web.config.

Juan T. Llibre, asp.net MVP
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