title: How to trace errors in asp.net core
body: <p>I noticed that when you create a default asp.net core project in visual studio, there is an Error action that looks like this:</p>
  
  <pre><code>    public IActionResult Error()
      {
          ViewData["RequestId"] = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
          return View();
      }
  </code></pre>
  
  <p>The error page shows that RequestId properly, however, I don't know how to check the details of that error if my user sends me a screenshot of that error. Where is this stored?</p>