Problem z odczytaniem pliku z archiwum zip

using (ZipArchive archive = ZipFile.OpenRead(path))
            {
                foreach (ZipArchiveEntry entry in archive.Entries)
                {

                    if (entry.FullName.EndsWith("G_SUBAREA.SHX", StringComparison.OrdinalIgnoreCase))
                    {
                        string shxFilePath = Path.GetFullPath(Path.Combine(path, entry.FullName));
                        
                        var memoryStream = entry.Open();
                        using (var filestrem =new FileStream(shxFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
                        {
                            memoryStream.CopyTo(filestrem);
                            System.IO.BinaryReader bReader = new BinaryReader(filestrem);
}