title: Log4net file rollingFile not deleting old files
body: <p>I have log4Net set up with the following config settings in a web service web.config file:</p>
  
  <pre><code>  &lt;log4net&gt;
  &lt;!-- RollingFile is set to be a File Appender --&gt;
  &lt;appender name="RollingFile" type="log4net.Appender.RollingFileAppender"&gt;
    &lt;file value="c:\temp\Sync.log" /&gt;
    &lt;appendToFile value="true" /&gt;
    &lt;maximumFileSize value="50MB" /&gt;
    &lt;maxSizeRollBackups value="10" /&gt;
    &lt;datePattern value="yyyyMMdd" /&gt;
    &lt;layout type="log4net.Layout.PatternLayout"&gt;
      &lt;conversionPattern value="%date  %-5level %-50logger - %message%newline%newline" /&gt;
    &lt;/layout&gt;
  &lt;/appender&gt;
  &lt;!-- Set root logger level to DEBUG to have all log --&gt;
  &lt;root&gt;
    &lt;level value="INFO" /&gt;
    &lt;appender-ref ref="RollingFile" /&gt;
  &lt;/root&gt;
  </code></pre>
  
  <p></p>
  
  <p>The issue I am having is when I look in temp I see 17 files 
  Sync.Log
  Sync.log20180424.log
  (other sync files with dates)
  ...
  the last one being
  Sync.log20180405</p>
  
  <p>I am confused as to why it is not removing the ones beyond 10 days as stated by the maxSizeRollBackups.
  I know that by default the is rollingStyle = composite.
  With my current config, how would it behave if I let it go?
  And as a second - what am I missing in my current settings.</p>
  
  <p>Thanks.   I know there are similar questions out there but in reading them I feel like I am still missing something.</p>