title: How to configure Log4Net to Delete logs by date
body: <pre><code>    &lt;appender name="FileAppender" type="log4net.Appender.RollingFileAppender"&gt;
        &lt;file value="logs\" /&gt;
        &lt;appendToFile value="true" /&gt;
        &lt;rollingStyle value="Date" /&gt;
        &lt;maxSizeRollBackups value="30" /&gt;
        &lt;datePattern value="yyyy-MM-dd'.txt'" /&gt;
        &lt;staticLogFileName value="false" /&gt;
       &lt;layout type="log4net.Layout.PatternLayout"&gt;
      &lt;conversionPattern value="%d{yyyy-MM-dd HH:mm} %-5level %message%newline%exception" /&gt;
    &lt;/layout&gt;
    &lt;lockingModel type="log4net.Appender.FileAppender+MinimalLock" /&gt;
  &lt;/appender&gt;
  </code></pre>
  
  <p>maximum number of backup files when rolling on date/time 
    boundaries is not supporting.can anyone please me</p>