Exponea SDK has a convenience method Track to help you track information about a payment for product/service within the application.
void Track(Payment);
To support multiple platforms and use-cases, SDK defines Map of values that contains basic information about the purchase.
_exponea.Track(new Payment(
12.34,
"EUR",
"CardHolder",
"abcd1234",
"Best product",
"INV_12345"
));