I never said, either explicitly nor implicitly, that File.Exists() modifies access time.
There is nothing there in that comment nor it's parent.
OF_EXISTS is not a thing by itself. It does not "open a file and then close it" which is a ridiculous and incorrect thing you DID actually say. OF_EXISTS is just a bitmask flag that can be returned by several functions, including ones that open files.
You have said a continuos string of incorrect things and employed invalid logic this whole time, and this yet again fits.
correction: you said opens a file and closes it about OF_EXIST the bitmask flag to tell OpenFile() how you want to open it. Slightly less ridiculous, yet still not a thing that opens a file, OpenFile() opens the file.
If you didn't say any such thing, then why did you bother countering my comment at https://news.ycombinator.com/item?id=42107195 ? Aha! Gotcha!