Asp.net mvc 4 如何在MVC4中实现自动重复计费（ARB）

我想用mvc4中的注册模块实现自动循环计费ARB系统

以及如何检查订阅是否已启动

  SubscriptionGateway target = new SubscriptionGateway(ApiLogin, TransactionKey);
        ISubscriptionRequest subscription = SubscriptionRequest.CreateMonthly("abc@xyz.com",
                                                                              "ARB Subscrition Test ", (decimal)6.50,6);
        subscription.CardNumber = "4111111111111111";
        subscription.CardExpirationMonth = 12;
        subscription.CardExpirationYear = 20;



        Address billToAddress = new Address();
        billToAddress.First = "gh";
        billToAddress.Last = "treggjhw";
        billToAddress.Company = "tre";
        billToAddress.City = "twe";
        billToAddress.Zip = "160055";
        subscription.BillingAddress = billToAddress;

            ISubscriptionRequest actual = target.CreateSubscription(subscription);

          var sid =  actual.SubscriptionID;

我已在sid中获得SubscriptionID，但请告诉我如何确认和更新它