How to check user is "logged in"?

I managed to find the correct one. It is below.

bool val1 = System.Web.HttpContext.Current.User.Identity.IsAuthenticated

EDIT

The credit of this edit goes to @Gianpiero Caretti who suggested this in comment.

bool val1 = (System.Web.HttpContext.Current.User != null) && System.Web.HttpContext.Current.User.Identity.IsAuthenticated

c# asp.net forms-authentication

The simplest way:

if (Request.IsAuthenticated) ...

c# asp.net forms-authentication

if (User.Identity.IsAuthenticated){    Page.Title = "Home page for " + User.Identity.Name;}else{    Page.Title = "Home page for guest user.";}

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