….make cross-platform apps.
you can use C# and .NET to build apps for Windows, C# under Mono on Linux/Mac, C# on the Android through MonoDroid, C# on the iPhone through MonoTouch, and use one of the ASP.NET frameworks (MVC or webforms) for the web.
here is the source link:http://programmers.stackexchange.com/questions/59924/technology-choice-for-cross-platform-development-desktop-and-phone?rq=1
Adios!