LINK - Objective-C to C#

https://lostechies.com/scottreynolds/2009/02/05/beginning-objective-c-for-the-c-guy/

http://developer.xamarin.com/guides/ios/advanced_topics/xamarin_for_objc/primer/

http://www.slideshare.net/JBollinger/objective-c-for-c-developers

http://adventuresdotnet.blogspot.com/2012/05/translating-objective-c-to-c-part-1-of.html

http://adventuresdotnet.blogspot.com/2012/05/translating-objective-c-to-cpart-2-of-n.html

Tool: Convert Obj-c to C# - http://razum.si/automagical/