class Program
    {
        static void Main(string[] args)
        {
            //要压缩的字符串
            string data = http://www.mamicode.com/"13800138000,验证码：1234【华信】\r\n13800138000,验证码：4567【华信】";

            byte[] buffer = System.Text.UTF8Encoding.UTF8.GetBytes(data);
            //压缩后的byte数组
            byte[] compressedbuffer = null;
            //Compress buffer,压缩缓存
            MemoryStream ms = new MemoryStream();
            using (GZipStream zs = new GZipStream(ms, CompressionMode.Compress, true))
            {
                zs.Write(buffer, 0, buffer.Length);

                //下面两句被注释掉的代码有问题, 对应的compressedbuffer的长度只有10--该10字节应该只是压缩buffer的header

                //zs.Flush();
                //compressedbuffer = ms.ToArray();           

            }

            //只有GZipStream在Dispose后调应对应MemoryStream.ToArray()所得到的Buffer才是我们需要的结果
            compressedbuffer = ms.ToArray();
            //将压缩后的byte数组basse64字符串
            string text64 = Convert.ToBase64String(compressedbuffer);
            Console.WriteLine(text64);
            Console.ReadKey();
        }
    }