출처 : https://stackify.com/log4net-guide-dotnet-logging/ If you have been doing .NET programming very long, odds are, you have touched a few projects that used log4net. It has been around for a long time and is very similar to log4j which is for Java. Log4net is a tool I have used forever and I wanted to share a tutorial to use for .Net logging! What is log4net and why should you use it, or any C..