private async void OpenFileButton_Click(object sender, RoutedEventArgs e)
        {
            StorageFile file = await ParquetUwp.GetFromFilePickerAsync();

            if (file != null && FileDragged != null)
            {
                await FileDragged(file);
            }
        }
        private async void HamburgerMenu_ItemClick(object sender, ItemClickEventArgs e)
        {
            MenuItem mi = e.ClickedItem as MenuItem;

            if (mi == null)
            {
                return;
            }

            if (mi.Action == "open")
            {
                await LoadAndDisplay(await ParquetUwp.GetFromFilePickerAsync());
            }
            else if (mi.Action == "issue")
            {
                await Windows.System.Launcher.LaunchUriAsync(new Uri("https://github.com/aloneguid/parquet-viewer-uwp/issues/new"));
            }
            else if (mi.Action == "about")
            {
                await Windows.System.Launcher.LaunchUriAsync(new Uri("https://github.com/aloneguid/parquet-viewer-uwp"));
            }

            HamburgerMenu.SelectedItem = null;
        }