SignalR is a library that enables developers to create applications that have real-time communication functionality. This article is not an introduction to SignalR, but rather a look through of some of the code for SignalChat, a WPF-MVVM instant messaging application that uses SignalR for real-time communication. We look at how SignalChat connects to the server, logs into the server, sends a message, displaying a chat message, and receives a chat message.