AssetManager.Update C# (CSharp) Метод

    void Update()
    {
    }

        public async Task <IActionResult> Edit(int id, [Bind("Id,TagNumber,AssetTypeId,Manufacturer,Model,Description,SerialNumber")] Asset asset)
        {
            if (id != asset.Id)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    AssetManager.Update(asset);
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!AssetExists(asset.Id))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["AssetTypeId"] = new SelectList(AssetTypeManager.GetAll(), "Id", "Name", asset.AssetTypeId);
            return(View(asset));
        }