var _ZIP = new System.IO.Compression.ZipArchive(Request.Files[0].InputStream);foreach (var element in _ZIP.Entries){    using (System.IO.StreamReader _ddd = new System.IO.StreamReader(element.Open()))    {        string _Text = _ddd.ReadToEnd();      }        using (System.IO.BinaryReader _ddd = new System.IO.BinaryReader(element.Open()))    {        string bx = " ";        byte buffer;        buffer = r.ReadByte();        bx = buffer.ToString();        buffer = r.ReadByte();        bx += buffer.ToString();                        //bx == 255216 jpg 파일     }}

 

static void Main(string[] args)        {            string str = string.Empty;            str= Console.ReadLine();            Console.WriteLine("length:" + str.Length);            str=ToZip(str);            Console.WriteLine("ToZip:" + str);            Console.WriteLine("length:" + str.Length);            str= ToUnzip(str);            Console.WriteLine("ToUnzip:" + str);            Console.WriteLine("length:" + str.Length);            Console.Read();        }        static string ToZip(string _str) {            string result = string.Empty;            byte[] bString = Encoding.UTF8.GetBytes(_str);            using (var msi = new System.IO.MemoryStream(bString))            using (var mso = new System.IO.MemoryStream())            {                using (var gs = new System.IO.Compression.GZipStream(mso, System.IO.Compression.CompressionMode.Compress))                {                    byte[] bTemp = new byte[4096];                    int count;                    while ((count = msi.Read(bTemp, 0, bTemp.Length)) != 0)                    {                        gs.Write(bTemp, 0, count);                    }                }                result= System.Convert.ToBase64String(mso.ToArray());            }            return result;        }        static string ToUnzip(string _str)        {            string result = string.Empty;            byte[] bString = System.Convert.FromBase64String(_str);            using (var msi = new System.IO.MemoryStream(bString))            using (var mso = new System.IO.MemoryStream())            {                using (var gs = new System.IO.Compression.GZipStream(msi, System.IO.Compression.CompressionMode.Decompress))                {                    byte[] bTemp = new byte[4096];                    int count;                    while ((count = gs.Read(bTemp, 0, bTemp.Length)) != 0)                    {                        mso.Write(bTemp, 0, count);                    }                }                result= Encoding.UTF8.GetString(mso.ToArray());            }            return result;        }