Update November, 2014: This project has evolved from a generic TCP communications framework into an HTTP web server capable of hosting WordPress, called Rapid Server.
.NET Sockets is a client/server communication system utilizing asynchronous .NET sockets via an Event-based Asynchronous Pattern (EAP) on top of an IAsyncResult Pattern with thread pools (I/O completion ports) and a binary packet-based TCP communications for maximum concurrency, capacity, performance and scalability.
Visit the Github repo for progress. Benchmarks can be found here and here.