log4net
output to a dialog
logger.Debug("Debug stuff");
logger.Info("Info Stuff");
logger.Error("Error Stuff"); //or warn, or fatal
<configuration>
<configSections>
<section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<appender name="LogFile" type="log4net.Appender.FileAppender">
<param name="File" value="output.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="Header" value="[Header]\r\n" />
<param name="Footer" value="[Footer]\r\n" />
<param name="ConversionPattern" value="%d [%t] %-5p %c %m%n" />
</layout>
</appender>
<root>
<level value="INFO" />
<appender-ref ref="LogFile" />
</root>
</log4net>
</configuration>