Reactive Extensions (Rx) is a library to compose asynchronous and event-based programs using observable collections and LINQ-style query operators. Today, Rx has graduated from incubation or so-called "dev lab" status. Rx is now an officially sanctioned Microsoft developer technology and has moved into a new happy home in the Link Removed. From all of us at Channel 9: Congratulations Erik, Wes, Bart and Jeffrey! Amazing work.