Not sure what your timelines are, but would you be interested in testing the Aedile C++ project I've been working on? I aim to have event read, event write, and NIP-46 signing finished and unit tested soon, but there's no substitute for real-world testing.
I also want to work on cross-language compatibility; I think I can get the Aedile binaries to work with C#.
No timelines. Just tinkering and breaking stuff. I have a solid concept for a TUI client. Feel free to hit me up in DMs or I can send you my simplex.
I check Simplex more than Nostr DMs. I'll DM you my Simplex though.