C# code to compress a file

public static void CompressFile(string filePath)
        {
            FileInfo info = new FileInfo(filePath);

            using (FileStream originalFileStream = info.OpenRead())
            {

                using (FileStream compressedFileStream = File.Create(filePath + ".gz"))
                {
                    using (GZipStream compressionStream = new GZipStream(compressedFileStream,
                       CompressionMode.Compress))
                    {
                        originalFileStream.CopyTo(compressionStream);

                    }
                }
            }
        }