Xamarin has been known for offering a native cross-platform development solution. It allows writing code using .NET and then running the same code on iOS, Android and WIndows devices. Microsoft has been supporting Xamarin tools in Visual Studio since VS 2013. But, now Microsoft has purchased Xamarin. It might boost Windows phone development and we might see more apps coming over to Windows. Even if Windows Phone apps don’t become popular it would still let .NET developers create cross-platform apps.