title: Build Errors in Visual Studio 2019 inconsistently show up in Error List
body: <p>I recently updated from Visual Studio 2017 Community Edition to Visual Studio 2019 Community Edition.</p>
  
  <p>Now, if I build my solution with errors, they will show up in the build output, but not all of them will appear in the error list.  It would appear only errors of open files will show up in the error list.  This is incredibly annoying.</p>
  
  <p>I am not alone in this issue.  It has been reported many times on Microsoft's forums, but no one has a definitive solution.</p>
  
  <p>I have tried a variety of solutions people suggested in those threads:</p>
  
  <ul>
  <li>I have ensured the filters are legitimate: Entire Solution, Errors enabled, Build + Intellisense.</li>
  <li>I have tried deleting the .vs folder and restarting Visual Studio.</li>
  <li>I just updated to the very latest Visual Studio 2019 version.  Supposedly there are many different versions of this error, happening in versions of Visual Studio all the way back to 2017.  Some supposedly have been fixed...?</li>
  <li>I have disabled parallel project loading.</li>
  </ul>
  
  <p>I have experienced this before in other versions of Visual Studio with Razor pages.  To my knowledge, that's to be expected in Razor though.</p>
  
  <p>The only other factor that I severely doubt impacts anything is that it's a Visual Studio project generated by Unity editor.  From what I've read, ASP.NET, Razor, Xamarin, and other frameworks have each had their own version of issue reported.  Perhaps Unity is afflicted by it too, but I don't see how or why.  I doubt Unity's auto-generated Visual Studio projects are <em>that</em> different from your standard library projects.</p>