What is Back State Concept in Windows Phone applications?

Question

so as of now when a back (hardware) button is clicked it closes the app. How can I work around this so it goes to the previous webpage or goes back to the index or something on those lines?

Answer 1

The navigation history of an app is represented as a last-in, first-out structure called a stack. This is also referred to here as the back stack, since it contains the set of pages in a stack structure that represents the back navigation of your app.