Logging with log4net. Colored Console Logging and File Logging demonstrated.

app.config

<?xml version="1.0"?>
<configuration>

  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/>
  </configSections>
  <log4net>
    <root>
      <level value="DEBUG" />
      <!--both colored-console-logging and file-logging is enabled--> 
      <appender-ref ref="LogFileAppender" />
      <appender-ref ref="ColoredConsoleAppender" />
    </root>
    <!--log to file-->
    <appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender" >
      <param name="File" value="F:\\log.txt" />
      <param name="AppendToFile" value="true" />
      <rollingStyle value="Size" />
      <maxSizeRollBackups value="10" />
      <maximumFileSize value="10MB" />
      <staticLogFileName value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%-5p%d{yyyy-MM-dd hh:mm:ss} – %m%n" />
      </layout>
    </appender>
    
    
    <!--colored log on console-->
    <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
      <mapping>
        <level value="INFO" />
        <forecolor value="Green" />
      </mapping>
      <mapping>
        <level value="ERROR" />
        <forecolor value="Red" />
      </mapping>
      <mapping>
        <level value="DEBUG" />
        <forecolor value="Yellow" />
      </mapping>
      <layout type="log4net.Layout.PatternLayout">
        <conversionpattern value="%date [%thread] %-5level - %message%newline" />
      </layout>
    </appender>
  </log4net>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>

</configuration>

LoggerDemo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using log4net;
using log4net.Config;

namespace LogForNetTest
{

    class Program
    {
        protected static readonly ILog log = LogManager.GetLogger(typeof(Program));

        static void Main(string[] args)
        {
            XmlConfigurator.Configure();

#if DEBUG
            log.Debug("Hello from debug"); //put this log while running in debug mode only
#endif
            log.Info("This is just to inform you");
            log.Warn("Something you should consider. better check this out!!!");
            log.Error("oops!!something wrong");
            log.Fatal("you are dead, man!!!");
            Console.ReadLine();

        }


    }


}

it would be nice to have WARN colored too

      <mapping>
        <level value="WARN" />
        <foreColor value="Yellow, HighIntensity" />
      </mapping>