// GET: Admin/SubscriptionProduct/Create
        public async Task <ActionResult> Create()
        {
            var model = new SubscriptionProductViewModel()
            {
                Subscriptions = await db.Subscriptions.ToListAsync(),
                Products      = await db.Products.ToListAsync()
            };

            return(View(model));
        }
        // GET: Admin/SubscriptionProduct/Delete/5
        public async Task <ActionResult> Delete(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }
            SubscriptionProduct subscriptionProduct = await db.SubscriptionProducts.FindAsync(id);

            if (subscriptionProduct == null)
            {
                return(HttpNotFound());
            }
            var viewModel = new SubscriptionProductViewModel
            {
                Products            = db.Products.ToList(),
                Subscriptions       = db.Subscriptions.ToList(),
                SubscriptionProduct = db.SubscriptionProducts.SingleOrDefault(sp => sp.Id == id)
            };

            return(View(viewModel));
        }