notificación del sistema(A transient message to the user that contains relevant, time-sensitive information and provides quick access to the subject of that content in an app. It can appear whether you are in another app, the Start screen, or on the desktop. Toasts are an optional part of the app experience and are intended to be used only when your app is not the active foreground app. A toast notification can contain text and images but secondary actions such as buttons are not supported)
