//Key 값이 8자리 정보 public string result(DesType type, string input) { var des = new DESCryptoServiceProvider() { Key = Key, IV = Key }; var ms = new MemoryStream(); //익명 타입으로 transform / data 정의 var property = new { transform = type.Equals(DesType.Encrypt) ? des.CreateEncryptor() : des.CreateDecryptor(), data = type.Equals(DesType.Encrypt) ? Encoding.UTF8.GetBytes(input.ToCharArray()) : Convert.FromBase64String(input) }; var cryStream = new CryptoStream(ms, property.transform, CryptoStreamMode.Write); var data = property.data; cryStream.Write(data, 0, data.Length); cryStream.FlushFinalBlock(); return(type.Equals(DesType.Encrypt) ? Convert.ToBase64String(ms.ToArray()) : Encoding.UTF8.GetString(ms.GetBuffer())); }