private async void RefreshButton_Click(object sender, RoutedEventArgs e)
        {
            LoadingGrid.IsLoading = true;
            await NewsHelper.RefreshNewsList();

            SetNewsOnTheList(await NewsHelper.GetNewsList());
        }
 private async void NewsList_Loaded(object sender, RoutedEventArgs e)
 {
     LoadingGrid.IsLoading = true;
     SetNewsOnTheList(await NewsHelper.GetNewsList());
 }