Привет!
Вот что есть в английском форуме:

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This is what I use!.
http://www.icsharpcode.net/OpenSource/SharpZipLib/
http://www.xceedsoft.com/cs/index.aspx

The xceed was best I think, after I bought it..hehhe
SharpZipLib is a Free Libray net with full source code!
Feel free to Modulate..hehe
supports Deflate Pkzip (winzip), Really cool
dunno why I never used it..
Then you have the:
http://www.gzip.org/zlib/
That one was really useful untill I wanted to put an encryption
and password. Could not do that!

Conclution for VB.NET I would say xceed rock the house!

Have a beer!
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