It's not really the same. The tutorial shows how to setup two frameworks to work together, so it's easy to extend the application in both front- and backend with other functionalities. Noone in their clear mind wouldn't combine asp.net and angular to display simple message
ASP.NET WebForms would have a bunch of <asp:Label id="myLabel"></asp:Label> (ASP namespaced form controls), with associated event handlers using the "page lifecycle" [1].