Apr 1, 2011 at 3:15 PM

How to check if the zip file is password protected?

Apr 4, 2011 at 6:06 PM

Check the documentation on ZipFile.Password. (And ZipEntry.Password)  (and maybe ZipFile.Encryption)

the short answer  is, DotNetZip does not support password-protected zip files. It does support password-protected Zip entries.  There's a difference. The documentation explains further.