public CarFactory(IDbCars db)
{
_ = db ??
throw new ArgumentNullException(nameof(db));
// NOTE: sync-over-async, might deadlock, i.e we are blocking!
Cars = db.GetCarsQueryAsync().Result.ToList();
}
public static async Task <CarFactory> CreateCarFactory(IDbCars db)
{
_ = db ??
throw new ArgumentNullException(nameof(db));
var cars = (await db.GetCarsQueryAsync()).ToList();
var carFactory = new CarFactory(cars);
return(carFactory);
}