log4net.config

<log4net>
  <root>
    <!--sending all logs to all appenders-->
    <level value="ALL" />
    <appender-ref ref="console" />
    <appender-ref ref="all_logs_file" />
    <appender-ref ref="rollbar" />
  </root>

  <!--the console appender-->
  <appender name="console" type="log4net.Appender.ConsoleAppender">
    <!--specifying the displayed layout-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %level %logger - %message%newline" />
    </layout>
  </appender>

  <!--a file appender for all logs-->
  <appender name="all_logs_file" type="log4net.Appender.FileAppender">
    <!--specifying the file-->
    <file value="log4netdemo.log" />
    <!--specifying the displayed layout-->
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date %level %logger - %message%newline" />
    </layout>
  </appender>


  <appender name="rollbar" type="Rollbar.PlugIns.Log4net.RollbarAppender, Rollbar.PlugIns.Log4net">>
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %level %logger - %message%newline" />
    </layout>
  </appender>
  
</log4net>