This .NET library defines an event that triggers whenever a log record is sent to NLog. It provides an easy to use API for intercepting logs.

1. Add a nuget dependency on NLog.Events.
2. Define a target with type OnLogEvent in your NLog.config, and a rule that sends some logs to it.
3. Subscribe to NLogEvents.Events.OnLog event. It'll fire whenever a log record is sent to the OnLogEvent you've defined.

See Example.