public ActionResult Index(DateTime?date = null)
{
var viewModel = new ViewModel();
var articleViewModel = new ArticleViewModel();
viewModel.Sections = articleViewModel.DistinctSections();
if (date == null)
{
viewModel.Articles = articleViewModel.Articles();
}
else
{
viewModel.Articles = articleViewModel.Articles((DateTime)date);
}
return(View(viewModel));
}