Last week I did a presentation on Xamarin Dev Days here in Ottawa, the presentation was on Introduction to Xamarin, unfortunately my demo did not work, the demo gods were not with me that day πŸ™
The demo code uses Microsoft Cognitive Service Bing Search to search for images to display on a mobile phone. Mainly I was doing a demo on the Android platform. The code base is on Github
https://github.com/xamarin/dev-days-labs/tree/master/Demos/app-imagesearch-cogs

The slides for my presentation are located here.

I also did another demo for Carleton University Business Program on Xamarin and if you wish to see more Xamarin related article please let me know πŸ™‚