New Post: Detect is Zip needs password?

Hello

I use this library in Windows Phone 8 and I cannot find the way how I can detect does file need password? There is no way to set password after I open stream
var zip=SharpCompress.Archive.Zip.ZipArchive.Open(fs);

I can use EntryExtractionBegin to check if entry needs password, but I cannot set it in this event.

What can I do?