>Fortunately, I don't have to deal with these complicated issues. Or, I don't know. Because the application is so large that I often do not remember what I did 20 years ago. Recently, I was looking at one of the classes of my .NET application and was thinking "I hope I never have a problem with this one because I don't remember anything about this code"

The algorithm for troubleshooting such cases is very simple, and yields the same result each time

1. wow... which idiot wrote this?
2. ouch, I did.