NLog Trace Target

NLog Trace Target for writing to System.Diagnostics.Trace for each logevent.

If having trouble with output, then check NLog InternalLogger for clues. See also Troubleshooting NLog

See the NLog Wiki - Trace Target for available options and examples.

NLog TraceListener

NLog TraceListener for redirecting System.Diagnostics.Trace into NLog Logger output.

See the NLog Wiki - NLogTraceListener for available options and examples.

NLog LayoutRenderer ${activityid} renders Guid from System.Diagnostics.Trace.CorrelationManager.ActivityId

See the NLog Wiki - ActivityId for available options and examples.

NLog will only recognize type-alias Trace when loading from NLog.config-file, if having added extension to NLog.config-file:

<extensions>
    <add assembly="NLog.Targets.Trace"/>
</extensions>

Alternative register from code using fluent configuration API:

LogManager.Setup().SetupExtensions(ext => {
   ext.RegisterTarget<NLog.Targets.TraceTarget>();
});