c# - FileSystemWatcher changed event not firing for recently opened file -


i implemented filesystemwatcher in windows forms application. changed event working when open file (say pdf-1) first time. when open same file second time within short span of time, changed event not firing. firing when open file (say pdf-2). again changed event firing first file (pdf-1) if open after time (say 1 or 2 hours).

i set internalbuffersize 16kb , notifyfilters used lastaccess, lastwrite, filename , directoryname.

i unable find out issue. can me out?

i have seen similar results filesystemwatcher raid controller disks, scsi disks , regular ide disks write cache enabled.

i experienced lot of other errors may have been caused thread synchronization problems. here description of problem.


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