title: Should GetEnvironmentVariable work in xUnit tests?
body: <p>If I set environment variables for a .Net Core web project in Visual Studio 2017 using the project properties page, I can read the value of the variable using <code>Environment.GetEnvironmentVariable</code>; however, when I set the environment variable for my xUnit testing project and then debug the test, <code>Environment.GetEnvironmentVariable</code> always returns null.  Is there something about the fact that it is a testing project that should prevent the variable from being used the same as with the web project?  If so, is there a way that I can set the environment variables for a test project?  Thank you.</p>