title: How is HttpContext TraceIdentifier generated in .NET Core?
body: <p>How is HttpContext TraceIdentifier (aka Correlation-Id) generated?</p>
  <p>I request a page through controller which gives me the following TraceId:
  <code>0HLEACIU86PT6:0000000D</code></p>
  <p>The page fires an ajax call which has the following TraceId:
  <code>0HLEACIU86PT7:00000005</code></p>
  <p>As you can see, they are very similar. Is it based on time?</p>
  <p>Why didn't I get the same TraceIdentifier?</p>
  <p>How can I ensure the same TraceIdentifier?</p>