c# - Possible bug in ZipArchive with archive mode update? -

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i ran problem ziparchivemode.update if zip file contains "directory entries".

i know there no such thing directory entry tools produce entries ziparchiveentry.length = 0 , ziparchiveentry.name = "" directories in zip file.

the following code corrupts zip file:

using (ziparchive archive = zipfile.open(@"d:\temp\test.zip", ziparchivemode.update)) { }

as can see nothing @ except opening zip file ziparchivemode.update , dispose in end.

the problem "directory entries" seem treated file entries. in output there new 0 byte entries directory names.

i still can open zip file , extract files per drag&drop. attempts extract zip file result in error messages. maybe because there 2 entries same fullname?

my workaround avoid ziparchivemode.update , use temporary memorystream. iterate on entries, ignore "directory entries" , copy file entries stream. way worked.

is bug in ziparchive or entries directories wrong? if want store empty directories in zip? , said: many tools out there seem produce such directory entries.


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