Free tutorial by Kevin Hoffman: Introduction to C# for iPhone and Android developers, part 1
This is a well done 12-part tutorial by Kevin Hoffman:
https://www.silverlightshow.net/items/C-for-Android-and-iOS-Developers.aspx
Frankly I can’t really add to it, but wanted to make sure you take a look at the material.
Ok, I can add one thing, make sure to leave a comment for Kevin as it will make him happy.