On rare occasion you actually need to introduce additional sequencing to work out what's going on. In that case, you might well want to keep it after the fact,

On rare occasion you actually need to introduce additional sequencing to work out what's going on. In that case, you might well want to keep it after the fact, though, since your fix might depend on that sequencing. But yes, most of the time that you need something like printf debugging, Debug.Trace works great.