Where can I find PayPal API documentation for C#?

Question

I can get PAYPAL API documentation that allows people on my site to pay through PAYPAL C#

This is only an example...

curl -v -X POST https://api.sandbox.paypal.com/v1/payments/payment \

Answer 1

v1/payments is older, there is a newer v2/orders API you should check out instead

Your question is rather short on details, but there is a .NET v2 Checkout SDK available here: https://developer.paypal.com/docs/api/rest-sdks/

The front end would look like this: https://developer.paypal.com/demo/checkout/#/pattern/server , which does fetch( XHR calls to a server to set up and capture a transaction