Microsoft released Visual Studio 2015 Update one and the latest version of .NET framework 4.6.1.
Improvements of .NET framework 4.6.1
WPF improvements for spell check, support for per-user custom dictionaries and improved touch performance
Enhanced support for Elliptic Curve Digital Signature Algorithm (ECDSA) X509 certificates
Added support in SQL Connectivity for Always On, Always Encrypted and improved connection open resiliency when connecting to Azure SQL Database
Azure SQL Database now supports distributed transactions using the updated System.Transactions APIs
Many other performance, stability, and reliability related fixes in RyuJIT, GC, WPF and WCF.
Visual Studio 2015 Update 1 includes a lot of changes in all the areas, if you are a user of this product we suggest you update your VS 2015.
Apache Cordova – supports iOS 9 and Android 6 Marshmallow
Universal Windows Apps – Buils Universal appas version 1.2 by targeting Windows 10 SDK Version 1511.
C# Interactive Window is back
On IDE you can now right-click on an interface or abstract method definition and navigate to its implementation by using the Go To Implementation shortcut.
Read more about the changes and also you can download the Visual Studio 2015 Update 1 also from this link