title: How to create new log file for each application run
body: <p>As the title implies how can I create a new log file for each application run ?
  I know how to do it for minute/hour/etc. but not for app. run</p>
  
  <p>There is what I have for now:</p>
  
  <pre><code>target name="Debug" archiveEvery="Hour"
  archiveFileName="${basedir}/logs/Debug.{#####}.txt" maxArchiveFiles="4" 
  archiveNumbering="Sequence" xsi:type="File" fileName="${basedir}/logs/Debug.txt" 
  layout="${date:format=HH\:mm\:ss} | ${level} | ${message} ${exception}
  ${exception:format=stacktrace}"
  </code></pre>
  
  <p>But actually I dont need to archive every hour, what I want is to archive every time when I run my app. 
  There is what I found in <a href="http://nlog-forum.1685105.n2.nabble.com/RE-One-log-per-application-run-td7348344.html" rel="noreferrer">old forum</a>, but I dont know how to use Cached_layout_renderer</p>