public void InsertIPN()
        {
            var repository = new CustomerRepositoryHelper();
            var properties = new NameValueCollection
            {
                { "custom", "1234|product" },
                { "receiver_email", "receiver_email" },
                { "receiver_id", "receiver_id" },
                { "residence_country", "residence_country" },
                { "test_ipn", "test_ipn" },
                { "transaction_subject", "transaction_subject" },
            };

            Console.WriteLine(repository.InsertIPN(properties, "call"));
        }