As the name suggests, this is a very simple and unfinished STUN client written in C# and based on RFC8489 that can run over TCP or UDP.
This was made as a proof of concept with the intent to add NAT punching to Mirror networking using the STUN protocol.
It only implements the XOR-MAPPED-ADDRESS, MAPPED-ADDRESS, and SOFTWARE attributes, these are enough to request an IP endpoint to a public STUN server.
Please don't