I do not think log4net provides a user interface.
But you can use various log4net viewers, for example:
1 LogViewer for Log4Net
LogViewer is a WPF application that allows you to view Log4Net log files. Logs must be in Xml (you just need a few lines in the application configuration file to configure it for use in this format). Search, log merging, filtering are already supported, but the project is open to new improvements.
2 YALV!
YALV! This is a log viewer for Log4Net that allows you to compare multiple log files at the same time. include features such as merging, filtering, opening the most recently used files, sorting items.
3 LOG4VIEW
LOG4VIEW is a powerful log viewer for log4net, NLog and log4j
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