title: Microsoft.Office.Interop.Excel not showing up even though I installed it
body: <p>I installed Microsoft.Office.Interop.Excel in Visual Studio:</p>
  <p><a href="https://i.stack.imgur.com/6ZfAn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6ZfAn.png" alt="Screen shot showing it's installed" /></a></p>
  <p>But when I try to add the reference, it does not show up:</p>
  <p><a href="https://i.stack.imgur.com/nAQJK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nAQJK.png" alt="Screen shot searching references to add" /></a></p>