private async void openButton_Click(object sender, RoutedEventArgs e)
{
FileOpenPicker picker = new FileOpenPicker();
picker.ViewMode = PickerViewMode.List;
picker.FileTypeFilter.Add(".WAR");
StorageFile file = await picker.PickSingleFileAsync();
if (file != null)
{
var stream = await file.OpenAsync(FileAccessMode.Read);
WarFile.LoadResourcesFromStream(stream.AsStreamForRead());
}
UpdateStatusText();
PopulateListBox();
listBox.Visibility = Visibility.Visible;
closeButton.IsEnabled = true;
}