This book assumes that you have a working knowledge of C# and .NET. Since this might not be the case for some readers, we have included a few links to help you get up to speed. Xamarin provides the following link which presents C# from an Objective-C perspective: http://docs.xamarin.com/guides/ios/advanced_topics/xamarin_for_objc/primer

Microsoft provides a set of tutorials for learning C# available at: http://msdn.microsoft.com/en-us/library/aa288436(v=vs.71).aspx.