C# log4net

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<log4net>
<root>
<level value="all" />
<appender-ref ref="console" />
<appender-ref ref="file" />
</root>
<appender name="console" type="log4net.appender.coloredconsoleappender">
<mapping>
<level value="error" />
<forecolor value="red, highintensity" />
</mapping>
<mapping>
<level value="info"/>
<forecolor value="green,highintensity"/>
</mapping>
<mapping>
<level value="debug"/>
<forecolor value="yellow,highintensity"/>
</mapping>
<mapping>
<level value="warn"/>
<forecolor value="purple,highintensity"/>
</mapping>
<mapping>
<level value="fatal"/>
<forecolor value="cyan,highintensity"/>
</mapping>
<layout type="log4net.layout.patternlayout">
<conversionpattern value="%date %level %logger - %message%newline" />
</layout>
</appender>
<appender name="file" type="log4net.appender.rollingfileappender">
<file value="myapp.log" />
<appendtofile value="true" />
<rollingstyle value="size" />
<maxsizerollbackups value="5" />
<maximumfilesize value="10mb" />
<staticlogfilename value="true" />
<layout type="log4net.layout.patternlayout">
<conversionpattern value="%date [%thread] %level %logger - %message%newline" />
</layout>
</appender>
</log4net>
</configuration>

 private static readonly log4net.ilog logger = log4net.logmanager.getlogger(system.reflection.methodbase.getcurrentmethod().declaringtype);
        static void main(string[] args)
        {
            log4netdemo();
            console.readline();
        }

        static void log4netdemo()
        {           
            logger.info($"{datetime.now.tostring("yyyymmddhhmmssffff")}");            
            logger.error($"{datetime.now.tostring("yyyymmddhhmmssffff")}");
            logger.debug($"{datetime.now.tostring("yyyymmddhhmmssffff")}");
            logger.fatal($"{datetime.now.tostring("yyyymmddhhmmssffff")}");
            logger.warn($"{datetime.now.tostring("yyyymmddhhmmssffff")}");             
        }