open a zip file in csharp

main.cs
using System.IO.Compression;

ZipArchive archive = ZipFile.OpenRead("path/to/zip/file.zip");
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main.cs
foreach (ZipArchiveEntry entry in archive.Entries)
{
    // Do something with the entry
}
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main.cs
foreach (ZipArchiveEntry entry in archive.Entries)
{
    using (Stream stream = entry.Open())
    {
        // Decompress the contents of the entry
    }
}
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main.cs
archive.Dispose(); // or use a using statement
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