Microsoft is increasing its cadence with software releases.  Visual Studio 2015 and .NET Core 1.0 make improvements on the 2015 releases, and it's expected that many developers who held out on upgrading will go directly to Visual Studio 2015.  The improvements to VS for 2015 are significant enough that Professional C# 6 titles need to be updated to accommodate new and updated template, deployment, ASP.NET, and more. Updates include: Reflection - updates for .NET Core 1.0 GC, different behaviors Visual Studio 2015 - new UI, new templates, editor enhancements Deployment - Windows 8.1 deployment updates Diagnostics - event log updates Threads, Tasks, and Synchronization - data flow Networking - HttpClient (instead of WebClient) Localization - update Windows 8.1 localization Windows Runtime - Windows Runtime 2.0, updates ADO.NET Entity Framework - Entity Framework 6.0, get rid of EntityObject, add Migrations... Windows Store Apps - Windows 8.1 ASP.NET Core - new Visual Studio templates ASP.NET Web Forms - new Visual Studio templates ASP.NET MVC - move Web API to a separate chapter, new Visual Studio templates ASP.NET Web API - replaces WCF Data Services, partly from the ASP.NET MVC chapter, more features like Odata Windows Workflow Foundation - add Workflow Manager 1.0   As with previous editions, the book provides everything the professional developer will need to know about C# and putting it to work.