The .NET Logging Library is the cutting edge of logging. It is more powerful than Log4Net, NLog, or SmartInspect and yet easier to use. Of course it has all the usual logging capabilities of the other guys including; a wide variety of targets, log levels, filtering, real time monitoring, binary file logging with attachments, and compatibility with log viewers like Chainsaw, Log4View, YALV, LogExpert, and YourLog4Net Viewer.