ASP.NET 4.5 now includes support for HTML5 Web Sockets which can provide a great way to add real-time communication to a Web app where a server can actually push data live to one or more clients. In this video from the New Features in ASP.NET 4.5 Pluralsight course I walk through getting started with creating a Web Sockets server using a Nuget package from Microsoft called Microsoft.WebSockets.