title: Visual Studio 2015 UnitTesting namespace missing?
body: <p>I'm using Visual Studio Professional 2015. I'm trying to create several unit tests within a test class but I can't find the Microsoft.VisualStudio.TestTools.UnitTesting namespace. I've tried adding a reference to it but it doesn't show up in any of the lists. Is there some new way to accomplish this? I have a Visual Studio 2013 project that is able to find this namespace. </p>