We are currently using SharpZipLib but since it uses the GPL we need to replace it with a commercial lib.
See my comment about #ziplib on the main post... but if you really need a commercial product (not open-source), IP*Works! Zip .NET might fit the bill. It does have TAR support according to this.
Have you looked at DotNetZip?
It is not under the GPL, but rather the Microsoft Public License (Ms-PL).
Just FYI. There is an option to use BSD licensed library for tar reading/writing. Gzip compression and decompression you can do with build-in GZipStream from microsoft .NET 2.0
If you want a tar library, there is a single-module implementation at
http://cheeso.members.winisp.net/srcview.aspx?dir=Tar&file=Tar.cs
来源：https://stackoverflow.com/questions/391936/what-is-a-good-commercial-tar-stream-lib-for-c-sharp-and-net