How do I integrate with the
I am facing the same issue. I may go for the REST API implementation with no SDK: https://developer.paypal.com/docs/api/
Or I just found that repository, it might be interesting :)
It is a port of the current .Net SDK to .NETCore. I haven't checked the code yet, but if it works it would save a lot of time!
You may also go for an old API option:
But as it is old I would not recommend it as PayPal may discontinue it someday.