Best .NET Framework compression class?

Posted by Jack on Stack Overflow See other posts from Stack Overflow or by Jack
Published on 2010-05-10T13:32:35Z Indexed on 2010/05/10 13:44 UTC
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c#

Hi all

Yes, I know GZipStream or DeflateStream is the common ones in .NET Framework which handle compression/decompression.

I wish to have compress/decompress functions in my program, but

I wish a .NET Framework C# one, not a 3rd party open source. I can't use because of those copyright restrictions in my program.
GZipStream and DeflateStream are not so good. for e.g., GZipStream compress a file to 480KB while 7Zip compress the same file to the size of 57KB.

Does Microsoft have other good compression methods???

Thanks

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