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Asked: 2026-06-01T12:23:48+00:00

i am writing a simple folder synchronization app. Therefore i want at the time

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i am writing a simple folder synchronization app.

Therefore i want at the time a file is created in the source folder it should be
copied to the destination.

My question is : how can i avoid errors when trying to read the source file, since another process might want to write to it ? Should i read the file in Read Write Share mode or is a simple System.IO.File.Copy enough ?

Thanks !

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1 Answer

  1. Editorial Team

    File Copy will lock the file while it is being copied.
    If it wasn’t locked, the file could be corrupted during the copy by another process
    So, when you start the copy process there are two possibilities:

    • None has a lock on your source file, then File.Copy start its work
      and locks the source file.
    • Someone has a lock on your source file, then File.Copy will throw an
      exception.
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