I've built an app that is used to track wallet balances using an xpub. It's using the nbitcoin library.
But I want to help push segwit adoption and add the ability to use a ypub address as part of bip49 to do the same thing.
I'm really struggling finding any .Net library that allows you to provide the ypub and derive the addresses.

Any help with this?

If there isn't a library, can someone breakdown the process of taking an extended public key and deriving the addresses? Then I can look to code the logic.

I kind of need to mimic the bip49 functionality on this site, except by only using the ypub.
https://iancoleman.io/bip39/