Hello everybody, I have an application with a vast number of existing log statements. Now we have the new requirement to prefix each log entry depending on some user input (i.e. no static text). An example: In the application, there is a statement log.debug('foo') and we expect a log entry like abcdef: foo where abcdef is a hash we generate on the fly. Unfortunately I did not use a wrapper class, and obviously I don't want to modify all log statements. Is there a way to add a custom Filter or Layout to Log4Net in order to achieve this task? How can this be done? I also thought about using an object renderer, but seemingly for strings the renderers are bypassed, making them unusable for the task at hand. Thanks for any hints! Best regards, Max