System.IO.Compression.ZipStorer.UpdateCrcAndSizes C# (CSharp) Méthode

        private void UpdateCrcAndSizes(ref ZipFileEntry _zfe)
        {
            long lastPos = this.ZipFileStream.Position;  // remember position

            this.ZipFileStream.Position = _zfe.HeaderOffset + 8;
            this.ZipFileStream.Write(BitConverter.GetBytes((ushort)_zfe.Method), 0, 2);  // zipping method

            this.ZipFileStream.Position = _zfe.HeaderOffset + 14;
            this.ZipFileStream.Write(BitConverter.GetBytes(_zfe.Crc32), 0, 4);  // Update CRC
            this.ZipFileStream.Write(BitConverter.GetBytes(_zfe.CompressedSize), 0, 4);  // Compressed size
            this.ZipFileStream.Write(BitConverter.GetBytes(_zfe.FileSize), 0, 4);  // Uncompressed size

            this.ZipFileStream.Position = lastPos;  // restore position
        }