The process of hooking up the Flickr API to .Net has been made incredibly by the fine folks at
Wacky Labs
Just get yourself a
Flickr API Key and with the Wacky Lab code, you will have your first app done in less than 15 minutes.
Here is the code that used to retrieve 9 different numbers from Flickr. The Flickr part is really simple, and the only complicated part is trying to ensure that the numbers are not from the same set - so they don't look alike.