SEToolbox.Interop.Asteroids.MyVoxelMap.Compress C# (CSharp) Method

        public static void Compress(string sourceFilename, string destinationFilename)
        {
            // Low memory, fast compress.
            using (var originalByteStream = new FileStream(sourceFilename, FileMode.Open))
            {
                if (File.Exists(destinationFilename))
                    File.Delete(destinationFilename);

                using (var compressedByteStream = new FileStream(destinationFilename, FileMode.CreateNew))
                {
                    compressedByteStream.Write(BitConverter.GetBytes(originalByteStream.Length), 0, 4);

                    // GZipStream requires using. Do not optimize the stream.
                    using (var compressionStream = new GZipStream(compressedByteStream, CompressionMode.Compress, true))
                    {
                        originalByteStream.CopyTo(compressionStream);
                    }

                    Debug.WriteLine("Compressed from {0:#,###0} bytes to {1:#,###0} bytes.", originalByteStream.Length, compressedByteStream.Length);
                }
            }
        }