Cross-Platform Development in Visual StudioAug 03, 2015
You can build apps for Android, iOS, and Windows devices by using Visual Studio. As you design your app, use tools in Visual Studio to easily add connected services such as Office 365, Azure Mobile Services, and Application Insights.
To build an app for Android or iOS, install Xamarin, and then create an Android or iOS project. To build an app for Windows devices, choose a universal Windows app project template. You can target Android, iOS, and Windows devices in the same solution if you want, and then share code between all your device projects by using a shared project or a Portable Class Library project.