in ContosoApp/ViewModels/AuthenticationViewModel.cs [328:343]
public async void LogoutClick()
{
if (ApplicationData.Current.RoamingSettings.Values.ContainsKey("IsLoggedIn") &&
(bool)ApplicationData.Current.RoamingSettings.Values["IsLoggedIn"])
{
ContentDialog SignoutDialog = new ContentDialog()
{
Title = "Sign out",
Content = "Sign out?",
PrimaryButtonText = "Sign out",
SecondaryButtonText = "Cancel"
};
await SignoutDialog.ShowAsync();
}
}