Within AsyncTcpSession.cs there are examples of the use of 'async' as a variable ... for example from line 95:
This is one of a number of examples.
What am I doing? Well, I am planning to put a number of websocket
services out on the web and I'm exploring the .Net options. Your code looks promising especially as MS stopped providing practical support post 09 and I don't want to work on their current shifting sands. However I will not do that without being
able to understand the security implications of using your code. A first step is to be able to build and test the source code base rather than rely on pre-built binaries. No disrepect intended, I'm just cautious.