Visual Studio 2015 introduces several exciting features. Here’s a list of some of them:
Cross Platform Development.
This is perhaps the biggest and most exciting feature. Although part of it was introduced in Visual Studio 2013 as well but 2015 takes it to next level. Now applications for Windows, Linux, iOS can be created in Visual Studio 2015. It bundles both Apache Cordova and Xamarin Starter Pack. And thanks to windows 10 the apps can run on Windows desktop, tablet, mobile and XBOX One. Pretty soon apps will run on Microsoft HoloLens and Surface Hub as well.
2. ASP.NET 5
ASP.NET uses CoreCLR which allows the web apps to run on Windows, Linux and Mac. MVC wise it comes with version 6. Visual Studio 2015 supports dynamic web development which means no recompilation of the code is required to see the rest of changes made to the source code. Simply save the code and refresh the browser to see the changes.
3. Open Source
.NET Framework went open source quite a while ago even before Visual Studio 2015 hit RTM. Microsoft went with GitHub as the platform for hosting open source .NET Framework Base Class Libraries as well as the compiler (Roslyn).