title: Type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft'
body: <p>I can see from <a href="https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2012/ms244252(v=vs.110)" rel="noreferrer">here</a>, that the namespace <code>Visual Studio</code> should exist within namespace <code>Microsoft</code>, yet I get that error and none of my tests are working!</p>
  
  <blockquote>
    <p>The type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)</p>
  </blockquote>
  
  <p>I am using Visual Studio 2012 with Windows 8.1 (all updated).</p>