Here's a quick port of the old CSClient example to a more up-to-date style. It does the same thing as the old sample (query for the first unacknowledge alert and ack it) but it uses .NET 4.5, the System.Net.Http.HttpClient async client, and the SWIS REST API instead of SOAP.
Send me your feedback on what you'd like to see in this sample and I'll get it rolled in to the next SDK drop.