protected override void OnNavigatedTo(NavigationEventArgs e) {
            base.OnNavigatedTo(e);

            var target = (TaskListTarget)Target;
            ViewModel = new TasksPageViewModel(target.ListId);

            NavInfo.Text = "parameter: " + e.Parameter;
        }
        protected override void OnNavigatedTo(NavigationEventArgs e) {
            base.OnNavigatedTo(e);

            var listId = long.Parse(e.Parameter.ToString());
            ViewModel = new TasksPageViewModel(listId);

            NavInfo.Text = "parameter: " + e.Parameter;
        }