(原創)檔案壓縮代碼

 #region  檔案壓縮
        /// <summary>
        /// 檔案壓縮
        /// </summary>
        /// <param name="M_str_DFile">壓縮前檔案及路徑</param>
        /// <param name="M_str_CFile">壓縮後檔案及路徑</param>
        public void compressFile(string M_str_DFile, string M_str_CFile)
        {
            if (!File.Exists(M_str_DFile)) throw new FileNotFoundException();
            using (FileStream sourceStream = new FileStream(M_str_DFile, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite))
            {
                byte[] buffer = new byte[sourceStream.Length];
                int checkCounter = sourceStream.Read(buffer, 0, buffer.Length);
                if (checkCounter != buffer.Length) throw new ApplicationException();
                using (FileStream destinationStream = new FileStream(M_str_CFile, FileMode.OpenOrCreate, FileAccess.Write))
                {
                    using (GZipStream compressedStream = new GZipStream(destinationStream, CompressionMode.Compress, true))
                    {
                        compressedStream.Write(buffer, 0, buffer.Length);
                    }
                }
            }
        }