private async Task SolutionOrProjectMenuItemCallbackAsync(CancellationToken cancellationToken)
 {
     try {
         var projects = VisualStudioInteraction.GetSelectedProjectsAsync(ProjectExtension);
         await _codeConversion.ConvertProjectsAsync <CSToVBConversion>(await projects, cancellationToken);
     } catch (Exception ex) {
         await _package.ShowExceptionAsync(ex);
     }
 }