ASP.NET: Does Response.Redirect() end the current session?

I'm in the middle of trying to fix my session timeout code, and have run into an interesting problem. I've taken the recommendations here and here to assume I've hit a timeout when Session. IsNewSession is true and a session cookie already exists.

According to multiple posts, these are signs that a timeout has occurred. All of these checks I have on my homepage before the user logs in (they're redirected to this page in timeout and logout situations). So let's assume that's all correct.

What I noticed immediately in my homepage, when I'm performing the session timeout checks, was that Session. IsNewSession was true, eventually leading to the logic that thinks there's a session timeout. Obviously it wasn't; the user just clicked Log Out.

By putting a breakpoint in Session_End in my Global file, I was able to see that Session_End is fired after I do the Response.Redirect() statement when the user logs off. So I'm wondering if that's supposed to happen? Originally I thought that it had something to do with Session.Abandon(), but that doesn't seem to be causing Session_End to fire.