How to leave a connection half open in C#?

Question

Computer networks

Good afternoon!
As everyone knows, C# has a library for creating TCP connections.
The very same TCP connection requires the so-called "triple handshake"
And so, the question itself. How is it possible to implement a half-open connection in C#? That is, how NOT to make the last third "handshake" with the ACK flag?

Answer 1

Will go down a level and not use a ready-made library that knows how to avoid "undersituations"