//build/ 2016 was a Microsoft conference for developers showcasing advancements in Windows 10, including a free anniversary update and integration of Cortana with other services. Key announcements included the introduction of HoloLens, the open-sourcing of Xamarin, and new tools for app development like the Microsoft Bot Framework and Visual Studio updates. Sessions covered topics such as building conversational bots, the future of C#, and enhancements in .NET technologies.