FailOverAppenderExampleConfigFile

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
  <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/>
    </startup>
  <log4net>
      
    <!--This custom appender handles failovers. If the first appender fails, it'll delegate the message to the back appender-->
    <appender name="FailoverAppender" type="MoreAppenders.FailoverAppender">
          <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
        </layout>
      
      <!--This is a custom test appender that will always throw an exception -->
      <!--The first and the default appender that will be used.-->
      <PrimaryAppender type="MoreAppenders.ExceptionThrowerAppender" >
        <ThrowExceptionForCount value="1" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
        </layout>        
      </PrimaryAppender>
      
      <!--This appender will be used only if the PrimaryAppender has failed-->
      <FailOverAppender type="log4net.Appender.RollingFileAppender">
        <file value="log.txt"/>
        <rollingStyle value="Size"/>
        <maxSizeRollBackups value="10"/>
        <maximumFileSize value="100mb"/>
        <appendToFile value="true"/>
        <staticLogFileName value="true"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%date [%thread] %-5level %logger - %message%newline"/>
        </layout>
      </FailOverAppender>
    </appender>
    
      <root>
        <level value="ALL"/>
      </root>
    
    <!--This can be either a full qualified type name or a random string that you selected as a name-->
    <logger name="MoreAppenders.Program">
      <level value="ALL"/>
      
      <!--configures the FailOverAppender-->
      <appender-ref ref="FailoverAppender"/>
    </logger>
  </log4net>