SharpZipLib is an OpenSource .NET compression library that supports Zip files using both stored and deflate compression method
The SharpZipLib currently supports the following versions of .NET
- .NET 1.1
- .NET 2.0
- .NET 3.5
- .NET 4.0
- .NET Compact Framework 1.0
- .NET Compact Framework 2.0
You can download SharpZiplib Assemblies here
There is also a Silverlight version of SharpZipLib which can be used with Silverlight 3, Silverlight 4, and Windows Phone 7. .