Many people say that the arrival of good garbage collected languages mean you don't have to worry about things like memory management any more. This might be the case for line of business software, but what about when you want to write a TCP server capable of dealing with a decent number of connections? In this talk we'll look at the challenges of TCP servers in C# by converting a synchronous, thread-per-client server to use hipster-compliant asynchronous evented IO and then optimising it not to die from GC pressure.