DevStudent

XAMARIN enable developers to create native ios, android and other mobile apps using C#.NET.
It gives native user interface, native performance, shared code across platforms to every moblie platform using C#.NET.

You can also use VB.NET bussiness and data logic code.

https://xamarin.com/    - Official website to download free trial of templates to use in Visual studio to create apps.

Approaches to create native apps without XAMARIN
XCode with Objective C for IOS App, Eclipse with Java for Android App, Visual Studio with C#.NET for Windows app.
Write once, run anywhere approach with browser fragmentation is like executing app on browser which is not equal to native app.

XAMARIN's Unique approach
It gives native user interface, native performance, shared code across platforms to every moblie platform using C#.NET.

C#.NET is Awesome we have excellent features like LINQ support, Work with XML easily XDocument, Event handling and delegates.

Link for XAMARIN documents
http://docs.xamarin.com/guides/cross-platform/getting_started/beginning_a_xamarin_trial/

Link for C#.NET tutorial
http://www.dbakings.com/CSharp/Default.aspx


XAMARIN APIs are always up to date with the latest APIs.