title: Access existing Correlation ID
body: <p>When returning <code>Problem</code> result ASP.NET generates standartized responce model that includes <code>&quot;traceId&quot;: &quot;00-d98512464f3f5a4b9ac3b8e02a03ecd0-8720663d0b55c94a-00&quot;</code>. That <code>traceId</code> is actually Correlation id since it includes Span Id and other stuff.</p>
  <p>That's great for error responses, but I also want to get that value for valid ones. Possible solution for this is to add it to response headers.</p>
  <p>Issue is I have no idea, how to get it (except calling <code>Problem().Value</code> and getting it from there).</p>