The .NET Reactive Extensions (Rx) is a library to compose asynchronous and event-based programs using observable collections and LINQ-style query operators. Rx is a superset of LINQ’s standard query operators that exposes asynchronous and event-based computations as push-based, observable collections via the new IObservable interface in .NET 4. This course walks you through the details of working with Rx to develop asynchronous applications.