public void GetRelatedLists(NewOrderVIewModel oVM)
        {
            UserManager userManager = new UserManager();
            CarsManager carsManager = new CarsManager();

            // 2) get all suppliers (id-name)
            var users = userManager.Users;

            // 3) get all categories (id-name)
            var cartyps = carsManager.CarsType;

            oVM.car = cartyps.Select(car => new SelectListItem()
            {
                Text  = car.Manufacturer,
                Value = car.Manufacturer
            }).ToList();

            oVM.user = users.Select(user => new SelectListItem()
            {
                Text  = user.User_name,
                Value = user.User_name
            }).ToList();

            //foreach (var user in users)
            //{
            //    SelectListItem item = new SelectListItem()
            //    {
            //        Text = user.User_name,
            //        Value = user.User_name
            //    };

            //    oVM.user.Add(item);
            //}



            userManager.Dispose();
            carsManager.Dispose();
        }