c# 使用GZipStream压缩和解压流

        ///

        /// 压缩流
        ///

        ///
        ///
        public  Stream DecompressStream(Stream sourceStream)
        {
            MemoryStream responseStream = new MemoryStream();
            using (System.IO.Compression.GZipStream compressedStream = new System.IO.Compression.GZipStream(responseStream, System.IO.Compression.CompressionMode.Compress, true))
            {
                byte[] buffer = new byte[sourceStream.Length];
                int checkCounter = sourceStream.Read(buffer, 0, buffer.Length);
                if (checkCounter != buffer.Length) throw new ApplicationException();
                compressedStream.Write(buffer, 0, buffer.Length);
            }
            responseStream.Position = 0;
            return responseStream;

        } 

//解压数据

        static  Stream DeCompress( Stream stream)

        {

 // 把 Stream 转换成 byte[]
            byte[] bytess = new byte[stream.Length];
            stream.Read(bytess, 0, bytes.Length);

            using (MemoryStream source = new MemoryStream())
            {
                using (GZipStream gs = new GZipStream(new MemoryStream(data), CompressionMode.Decompress, true))
                {
                    //从压缩流中读出所有数据
                    byte[] bytes = new byte[4096];
                    int n;
                    while ((n = gs.Read(bytes, 0, bytes.Length)) != 0)
                    {
                        source.Write(bytes, 0, n);
                    }
                }
                return source;
            }
        }