public ActionResult Edit(CharacteristicValuesViewModel model)
        {
            if (ModelState.IsValid)
            {
                this.Edit<CharacteristicValue>(model);
                return RedirectToAction("Index");
            }

            this.GetTypesForList(model.CharacteristicTypeId);
            return View(model);
        }
        public ActionResult Create(CharacteristicValuesViewModel model)
        {
            if (ModelState.IsValid)
            {
                this.Create<CharacteristicValue>(model);
                return RedirectToAction("Index");
            }

            this.GetTypesForList();
            return View(model);
        }