public ActionResult <IEnumerable <Checksum> > GetChecksums()
        {
            List <Checksum> checksums = new List <Checksum>();
            long?           product   = ParallaxController.GetCheckSUMProducts();
            long?           inventory = ParallaxController.GetCheckSUMItems();
            long?           direction = ParallaxController.GetCheckSUMDirections();

            if (product != null)
            {
                checksums.Add(new Checksum(Checksum.PRODUCT, product.Value));
            }
            if (inventory != null)
            {
                checksums.Add(new Checksum(Checksum.INVENTORY, inventory.Value));
            }
            if (direction != null)
            {
                checksums.Add(new Checksum(Checksum.DIRECTION, direction.Value));
            }
            return(checksums);
        }
 public ActionResult <long?> GetChecksum()
 {
     return(ParallaxController.GetCheckSUMDirections());
 }