How to Close app metro in WinRT 8.1

Question

Hi Everybody,
I want to implement button [Close App] in UI , not using icon [X] in WinRT 8.1
I try to using  Application.Current.Exit(); Window.Current.Close(); but not sucess.
Please support me. Thanks so much.

Answer 1

Why do you want to do this? What is the scenario you are trying to achieve? What is the overall goal?
Adding a close app button to the app's UI is strongly recommended against.
There are very few scenarios where this is a useful thing to do. Unless this is in response to an unrecoverable error state there is probably a better way to achieve the overall goal than a close button.
Letting the system and the User control the app's lifetime is cleaner, standard, and less power-hungry than forcing a closure.
That said,
Application.Current.Exit() is the way to exit an app programmatically. If you really want to go down this path, in what way is it not working for you?