A simple WinForms dictionary suggest application. Upon the user entering a search term, the application will fire off a call to a web service to get word suggestions back using Rx.net
Rx.Net: https://github.com/Reactive-Extensions/Rx.NET
Web service to get word suggestions back: http://services.aonaware.com/DictService/
Moq: https://github.com/moq/moq4