There is no out-of-box support for log4net yet.
The most relevant sample is: Samples\Introduction\Extensibility.sln
This shows how to parse semi-structured text file:
- some columns come from the tracing infrastructure
- the text message is all up to the user
Compared to log4net, the ULS format has one extra concept - event type id like "nasq"
This allows Tx to filter irrelevant events and apply the proper regular expression.
I will write wikis about the Playback internals and the extensibility.