Need C# Code after PayPal API 1.9.1 was deprecated

[Coreysan]

Last year I coded for PayPal on my web store. I built an API using the 1.9.1 API, but then I discovered this year that it's deprecated.

NuGet says to point to a new package called "PayPalServerSDK", but now my C# doesn't resolve with the newest package.

Does anyone have C# code that's compatible with this SDK?