public override async Task OnInitializeAsync(IActivatedEventArgs args)
{
if (Window.Current.Content as ModalDialog == null)
{
// create a new frame
var nav = NavigationServiceFactory(BackButton.Attach, ExistingContent.Include);
// create modal root
setting.GetThemeApp();
Window.Current.Content = new ModalDialog
{
DisableBackButtonWhenModal = true,
Content = new Views.Shell(nav),
};
}
await Task.CompletedTask;
}