Azure Log4net appender. This will produce output in the streaming log service in visual studio. #log4net, #azure.

Azure Trace Apender.cs

public class AzureTraceAppender : TraceAppender
  {
      protected override void Append(LoggingEvent loggingEvent)
      {
          var level = loggingEvent.Level;
          var message = RenderLoggingEvent(loggingEvent);
          if (level >= Level.Error)
              Trace.TraceError(message);
          else if (level >= Level.Warn)
              Trace.TraceWarning(message);
          else if (level >= Level.Info)
              Trace.TraceInformation(message);
          else
              Trace.Write(message);
          if (ImmediateFlush)
              Trace.Flush();
      }
  }

Log.config

<log4net>
    <appender name="AzureTraceAppender" type="XXX.Logging.AzureTraceAppender">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%logger - %message" />
        </layout>
    </appender>
    <root>
        <level value="ALL" />
        <appender-ref ref="AzureTraceAppender" />
    </root>
</log4net>