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Asked: 2026-05-21T16:43:05+00:00

I am using a FileSystemWatcher to monitor changes to files. MSDN documentation says that

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I am using a FileSystemWatcher to monitor changes to files.

MSDN documentation says that if Changed is passed for the ChangeType in the FileSystemEventArgs parameter, it indicated “The change of a file or folder. The types of changes include: changes to size, attributes, security settings, last write, and last access time.”

Is there a way to find out which one of those changed? For example, last access can alone change without change to size. I want to find that out. How can I do it?

P.S. Of course if I record all the attributes that I care about every time Changed event is fired, and then compared them, I can find out what changed. But is there an easier way.. like being notified through some event or reading a property of some object? 😀

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  1. Editorial Team

    You can use FileSystemWatcher.NotifyFilter to filter events based on what happened. MSDN

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