This allows you to install each preview release of the SDK and emulator with previously-installed SDKs and emulators on the Windows 10 SDK allowing you to manage which OS version (released or preview) you want to develop and test your app against. Each preview SDK release installs side by side of the official Windows 10 tooling for Visual Studio 2015. When running the latest SDK and emulator in your local development environment, your apps will be able to access the latest Windows capabilities and APIs available in the preview build. While we’ll do our best to align with the OS release schedule, it is possible that not every OS release will bring an updated SDK.
As part of these preview releases, we will also release a matching version of the Windows 10 Mobile emulator. Our goal is to release a Windows 10 SDK preview that corresponds to OS flights delivered through the Windows 10 Insider Preview Fast Ring. In addition, starting this month, we will release previews of the Windows 10 SDK more often to our Windows Insiders. This will allow you to build your Universal Windows Platform apps and submit them to the Windows Store. We are working to deliver the Windows 10 developer tools for Visual Studio 2015 with the release of Windows 10. With Windows 10 being released July 29, 2015, we want to update you on some new things and some things you can do to get ready now.