title: Get detailed error for exception in SignalR Core Hub method execution
body: <p>When I call Hub method I get frame response:</p>
  
  <blockquote>
    <p>{"invocationId":"1","type":3,"error":"An error occurred while updating
    the entries. See the inner exception for details."}</p>
  </blockquote>
  
  <p>How can I get detailed error report (row and file where error occurred) without manually debugging and using step over and check where the code raise exception.</p>
  
  <p>On net I found plenty codes where <code>EnableDetailedErrors</code> is used</p>
  
  <pre><code>services.AddSignalR(options =&gt; 
          {
              options.Hubs.EnableDetailedErrors = true;
          });
  </code></pre>
  
  <p>but options (at least in version 1.0.0-alpha2-final) does not have property Hubs.</p>