Last modification date lost when saving

[DoerrSt]

Hello,
I am open an existing ZIP file and remove some files from the archive, after saving it with a new name the "last modification date" in the new ZIP file is set to the current date/time instead of using the existing attributes in the zip entry-class.

like

Dim zip As New ZipFile("C:\temp\zipfile.zip")
' Remove an entry using
zip.RemoveEntry(entry)
zip.Save("c:\temp\newzip.zip")

Not sure if this behaviour is by intention, my expectation was that the attributes in each zip-entry stay unchanged.
Thanks!