What is the difference between `Application.LastLogin` and `Session.UserID` in terms of data persistence?

The difference between `Application.LastLogin` and `Session.UserID` lies in their data persistence – how long the data they store is kept and where it's stored. `Application.LastLogin` stores information that persists across multiple user sessions and is associated with the entire application, while `Session.UserID` stores information specific to a single user's session. Let's break down each term. An *application* in this context refers to the entire web application running on a server. `Application` is a global object in ASP.NET that holds data shared by all users accessing the application. `Application.LastLogin` is a property of this `Application` object. Setting `Application.LastLogin` to a timestamp, for example, wo....