// GET: Rental/Details/5
public async Task <ActionResult> Details(string id)
{
RentalRepository repo = new RentalRepository();
IEnumerable <Rental> result = await repo.GetAllByRegistrationNumber(id);
var viewModel = new RentalDetailsViewModel()
{
RegistrationNumber = id,
Year = result.Select(a => a.Year).Distinct().OrderBy(a => a),
AggregatedData = GetAggregatedData(result),
Rentals = result
};
return(View(viewModel));
}