❔ DBSet manipulation

// GET: Order/Edit/5
        public ActionResult Edit(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            Order order = db.Orders.Find(id);
            if (order == null)
            {
                return HttpNotFound();
            }

            ViewBag.VesselID = new SelectList(db.Customers, "CustomerID", "CustomerName", order.CustomerID);
            return View(order);
        }