In log4net configuration you can filter out event by level in almost any appender, since it is supported by the AppenderSkeleton, the base class for every appender. <appender name="GeneralLog" type="log4net.Appender.RollingFileAppender"> <file value="Logs/exception.txt" /> <appendToFile value="true" /> <maximumFileSize value="10000KB" /> <rollingStyle value="Size" /> [...]

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