Extraction always fail for Hancom cell & show files

[phuclv90]

Hancom Office *.cell and *.show files are almost similar to MS Office *.xlsx and *.pptx, however when extracting them I always get the Not a valid Win32 FileTime. exception although other tools like 7z and winrar can extract them without problem

using(var zip = new ZipFile(inputFile))
    zip.ExtractAll(outputPath, ExtractExistingFileAction.OverwriteSilently);

Some sample files: hancom.zip

[peter-dolkens]

I recommend checking https://github.com/haf/DotNetZip.Semverd as it appears this project is simply a snapshot, whilst the other project has full history, and at least a minimal amount of maintenance.