2016-01-14-custom-properties-in-log4net-logging_003.xml

<appender name="TracingAppenderFile" type="log4net.Appender.RollingFileAppender">
    <file value=".\\\App_Data\\\Logs\" />
    <datePattern value="yyyy-MM-dd'-TracingLogs.log'" />
    <appendToFile value="true" />
    <maximumFileSize value="256KB" />
    <maxSizeRollBackups value="20" />
    <rollingStyle value="Date" />
    <staticLogFileName value="false" />
    <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
    <layout type="log4net.Layout.PatternLayout">
        <converter>
            <name value="HTTPUser" />
            <type value="hbulens.Logging.HttpContextUserPatternConverter" />
        </converter>
        <conversionPattern value="%level %date - %message - [%property{Category}] - [%HTTPUser] %newline" />
    </layout>
    <parameter>
        <parameterName value="@Category" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%property{Category}" />
        </layout>
    </parameter>
    <parameter>
        <parameterName value="@User" />
        <dbType value="String" />
        <size value="255" />
    </parameter>
</appender>