public ActionResult CreateOrEdit(Material material)
        {
            if (this.ModelState.IsValid)
            {
                material = materialService.CreateOrEditMaterial(material);
                return(RedirectToAction("Index"));
            }

            ViewBag.UnityTypes = new SelectList(unityTypeService.GetUnityTypes(), "UnityTypeId", "Description");

            return(View("Form", material));
        }