Log4Net - 如何添加仅用于特定代码段的第二个记录器

I'm using Log4Net 2.0, I have it working as required but which to add another logger for specific log statements. All logging is done to a single file appender. The change I want to make is that a 3rd party application fires events containing debug/error information, I can catch this information and whilst useful I feel it pollutes the normal application log file, and would instead prefer this to be stored in its own log file.I'm using Log4Net 2.0, I have it working as req