[C#] TCP server to handle lots of connection help

Hi, I'm interested in making a chat server that would be able to manage 100k+ connections, I have looked all over the internet but I have not found any articles or source codes to anything like this, I have read something about XF.server but in order to do a commercial server i need to pay money for their approach.

So what I ask is for some guidance, some links. Maybe the information is out there but I just did not know how to look for it.


Thanks in advance.

Well, this is NOT a C# forum, so I'd look elsewhere, but for that many connections, look for information on IO completion ports (IOCP).

Well let's say I make a prototype, how can I stress test it to see if it actually can hold more than like 6k connections?