Who changed my IIS 7.5 configuration?

I was asked today whether you can find out who was the last person to change the IIS 7.5 configuration files in case someone made a mess with the configuration. This question is a decade-old question that bothers developers and IT all around the world - “Who touched my stuff?” So what can we do in order to find out who is to blame? apparently, there is a simple way to do it, because IIS 7.5 sends trace messages for each configuration change it detects!