sharpziplib compressed files to be uncompressed externally

I have a scenario where by I want to zip an email attachment using SharpZipLib. Then the end user will open the attachment and will unzip the attached file.

Will t开发者_StackOverflow社区he file originally zipped file using SharpZipLib be easily unzipped by other programs for my end user?

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It depends on how you use SharpZipLib. There is more than one way to compress the data with this library.

Here is example of method that will create a zip file that you will be able to open in pretty much any zip aware application:

private static byte[] CreateZip(byte[] fileBytes, string fileName)
{
    using (var memoryStream = new MemoryStream())
    using (var zipStream = new ZipOutputStream(memoryStream))
    {
        var crc = new Crc32();
        crc.Reset();
        crc.Update(fileBytes);

        var zipEntry =
            new ZipEntry(fileName)
            {
                Crc = crc.Value,
                DateTime = DateTime.Now,
                Size = fileBytes.Length
            };
        zipStream.PutNextEntry(zipEntry);
        zipStream.Write(fileBytes, 0, fileBytes.Length);
        zipStream.Finish();
        zipStream.Close();
        return memoryStream.ToArray();
    }
}

Usage:

var fileBytes = File.ReadAllBytes(@"C:/1.xml");

var zipBytes = CreateZip(fileBytes, "MyFile.xml");

File.WriteAllBytes(@"C:/2.zip", zipBytes);

This CreateZip method is optimized for the cases when you already have bytes in memory and you just want to compress them and send without even saving to disk.