title: Visual Studio community 2019 cannot add cpp files to project
body: <p><a href="https://i.stack.imgur.com/uWqsT.png" rel="nofollow noreferrer">file browser</a></p>
  <p><a href="https://i.stack.imgur.com/uZR6h.png" rel="nofollow noreferrer">Installation details</a></p>
  <p>Main problem:</p>
  <ul>
  <li>I have created a new, empty project and I want to populate it with
  pre-existing .cpp files and a header file, but the file browser does
  not allow the .cpp or .h extensions to show.</li>
  </ul>
  <p>Possible cause 1:</p>
  <ul>
  <li>I think it might be the installation details</li>
  </ul>
  <p>Possible cause 2:</p>
  <ul>
  <li>I have some legacy files from visual studio code</li>
  </ul>
  <p>Context:</p>
  <ul>
  <li>I migrated from using VS code to VS because code somehow wasn't able
  to compile the 2 .cpp and 1 .h files my teacher gave me. I got tired
  with messing about JSON files and compilers and such and threw in the
  towel when my professor recommended the school's preferred IDE.</li>
  </ul>