Rx - for beginners (part 11): ObserveOn this post is the 11th in a series of posts about the new Reactive Framework ( Rx ). the series TOC can found here . in this post we will focus on the ObserveOn… the code sample for this post can be found here . sometime it is important that the observation will occurs on specific thread . for example GUI application like ( WinForm , WPF and Silverlight ) throw exception whenever UI component accessed on thread different than its creation thread...