protected void Page_Load(object sender, EventArgs e)
        {
            HttpContext CurrContext = HttpContext.Current;

            // ###Amount
            // Create an Amount object to
            // represent the amount to be
            // refunded. Create the refund object, if the refund is partial
            Amount amount = new Amount();
            amount.currency = "USD";
            amount.total = "0.01";

            // ###Refund
            // A refund transaction.
            // Use the amount to create
            // a refund object
            Refund refund = new Refund();
            refund.amount = amount;
            // ###Sale
            // A sale transaction.
            // Create a Sale object with the
            // given sale transaction id.
            Sale sale = new Sale();
            sale.id = "03W403310B593121A";
            try
            {
                // ###AccessToken
                // Retrieve the access token from
                // OAuthTokenCredential by passing in
                // ClientID and ClientSecret
                // It is not mandatory to generate Access Token on a per call basis.
                // Typically the access token can be generated once and
                // reused within the expiry window
                string accessToken = new OAuthTokenCredential(ConfigManager.Instance.GetProperties()["ClientID"], ConfigManager.Instance.GetProperties()["ClientSecret"]).GetAccessToken();

                // ### Api Context
                // Pass in a `ApiContext` object to authenticate
                // the call and to send a unique request id
                // (that ensures idempotency). The SDK generates
                // a request id if you do not pass one explicitly.
                APIContext apiContext = new APIContext(accessToken);
                // Use this variant if you want to pass in a request id
                // that is meaningful in your application, ideally
                // a order id.
                // String requestId = Long.toString(System.nanoTime();
                // APIContext apiContext = new APIContext(accessToken, requestId ));

                // Refund by posting to the APIService
                // using a valid AccessToken
                Refund refundedSale = sale.Refund(apiContext, refund);
                CurrContext.Items.Add("ResponseJson",JObject.Parse(refundedSale.ConvertToJson()).ToString(Formatting.Indented));
            }
            catch (PayPal.Exception.PayPalException ex)
            {
                CurrContext.Items.Add("Error", ex.Message);
            }
            CurrContext.Items.Add("RequestJson",
                  JObject.Parse(refund.ConvertToJson()).ToString(Formatting.Indented));
            Server.Transfer("~/Response.aspx");
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            HttpContext CurrContext = HttpContext.Current;

            // ###Amount
            // Create an Amount object to
            // represent the amount to be
            // refunded. Create the refund object, if the refund is partial
            Amount amount = new Amount();
            amount.currency = "USD";
            amount.total = "0.01";

            // ###Refund
            // A refund transaction.
            // Use the amount to create
            // a refund object
            Refund refund = new Refund();
            refund.amount = amount;
            // ###Sale
            // A sale transaction.
            // Create a Sale object with the
            // given sale transaction id.
            Sale sale = new Sale();
            sale.id = "7X350557WR366683S";
            try
            {
                // ### Api Context
                // Pass in a `APIContext` object to authenticate 
                // the call and to send a unique request id 
                // (that ensures idempotency). The SDK generates
                // a request id if you do not pass one explicitly. 
                 // See [Configuration.cs](/Source/Configuration.html) to know more about APIContext..
                APIContext apiContext = Configuration.GetAPIContext();

                // Refund by posting Refund object using a valid APIContext
                Refund refundedSale = sale.Refund(apiContext, refund);
                CurrContext.Items.Add("ResponseJson", JObject.Parse(refundedSale.ConvertToJson()).ToString(Formatting.Indented));
            }
            catch (PayPal.Exception.PayPalException ex)
            {
                CurrContext.Items.Add("Error", ex.Message);
            }
            CurrContext.Items.Add("RequestJson",
                  JObject.Parse(refund.ConvertToJson()).ToString(Formatting.Indented));
            Server.Transfer("~/Response.aspx");
        }