C# and the BCL do not support zip (as in WinZip) compression out of the box from 1.0 to 3.5. (They plan to.) If you are doing your own compression and don't care about the protocol, you can use the GZipStream libraries. If you want to decompress files compressed with WinZip, you will have to:
- write your own library,
- use a third party library,
- or call the winZip command line from your C# app.
Read about it here:
BCL Blog - Compression
On that page you will find links to creating a zip reader writer using the J# libraries (which I have done and is fairly easy). I see now there is a new link to getting GZipStream to produce zip files readable by WinZip...I have not tried that.
Otherwise, this is why the
ICSharp Zip Library is very popular.
A targeted search on "C#" "Zip Compression" will lead you to some other attempted solutions.
