title: How to output event source Class Name in serilog RollingFile outputTemplate?
body: <p>The <code>RollingFile.outputTemplate</code> that I am using for my sink in <code>&lt;appSettings&gt;</code> configuration is as below:</p>
  
  <pre class="lang-XML prettyprint-override"><code>&lt;add key="serilog:write-to:RollingFile.outputTemplate" value="{Timestamp:HH:mm:ss} [{Level}] {Message}{NewLine}{Exception}" /&gt;
  </code></pre>
  
  <p>The output log I am getting as:</p>
  
  <p><code>19:55:10 [Information] Application_Start...</code></p>
  
  <p>However, I want to also output the Class Name (source) from where the Log was generated, like -</p>
  
  <p><code>19:55:10 [Information] [Global.asax.cs] Application_Start...</code></p>
  
  <p>What should I add to the "value"? I added <strong>[Source]</strong> but is not working.</p>
  
  <blockquote>
    <p>value="{Timestamp:HH:mm:ss} [{Level}] <strong>[Source?]</strong> {Message}{NewLine}{Exception}"</p>
  </blockquote>