using (ZipArchive source = ZipFile.Open(sourceFileName, ZipArchiveMode.Read, null))
{
    foreach (ZipArchiveEntry entry in source.Entries)
    {
        string fullPath = Path.GetFullPath(Path.Combine(destinationDirectory, entry.FullName));

        if (Path.GetFileName(fullPath).Length != 0)
        {
            Directory.CreateDirectory(Path.GetDirectoryName(fullPath));
            // The boolean parameter determines whether an existing file that has the same name as the destination file should be overwritten
            entry.ExtractToFile(fullPath, true);
        }
    }
}