title: List of Log4net Conversion Patterns
body: <p>Is there a comprehensive list of all the conversion patterns available for log4net? I can't even find them in the source code.</p>
  
  <p>All I have found is <a href="https://logging.apache.org/log4net/log4net-1.2.13/release/sdk/log4net.Layout.PatternLayout.html" rel="noreferrer">this</a>; shouldn't there be more patterns? For example, how would I get the name of the hosting application?</p>
  
  <p>Also, how can I add my own patterns?</p>
  
  <p>As an example here is the comparable list but for <a href="https://nlog-project.org/config/?tab=layout-renderers" rel="noreferrer">nlog</a>.</p>
  
  <p><strong>Edit:</strong>
  I have found the Pattern for application name; it's <code>[Application]</code>. But I'm still looking for the mother-load. Can someone at least point me to the class in the source that manages these? Maybe I could find the list from that.</p>