<appender name="Hangfire" type="log4net.Appender.FileAppender">
  <file value="......LogsHangfireLogger.txt" />
  <appendToFile value="true" />
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="{"EntryDate":"%date{ddd MMM dd HH:mm:ss zzz yyyy}","Level":"%level",Logger":"%logger","Message":"%message","Properties":"%properties{CorrelationId}"} %newline" />
  </layout>
</appender>
<logger name="Hangfire">
  <level value="ALL" />
  <appender-ref ref="Hangfire" />
</logger>

using (LogProvider.OpenMappedContext("CorrelationId", Guid.NewGuid().ToString())) {
                backGroundClient.Enqueue<IMessageHandler<TMessage>>((handler) => handler.Handle(message));;
            }