using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

using System.Threading.Tasks;

public class Program

{

    public class Encryption

    {

​

        static byte[] Key = new byte[32] { 21, 11, 78, 213, 76, 2, 83, 121, 17, 169, 56, 89, 62, 241, 145, 122, 2, 94, 11, 214, 119, 35, 114, 188, 1, 12, 16, 87, 99, 55, 43, 76 };

        static byte[] IV = new byte[16] { 21, 121, 9, 129, 77, 81, 123, 95, 51, 217, 143, 89, 11, 100, 222, 3 };

        static byte[] inputByteArray;

        static RijndaelManaged myR = new RijndaelManaged();

​

​

        public static string Encrypt(string stringToEncrypt)

        {

            inputByteArray = Encoding.UTF8.GetBytes(stringToEncrypt);

            ICryptoTransform encryptor = myR.CreateEncryptor(Key, IV);

            try

            {

                MemoryStream ms = new MemoryStream();

                CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write);

                cs.Write(inputByteArray, 0, inputByteArray.Length);

                cs.FlushFinalBlock();

​

                return Convert.ToBase64String(ms.ToArray());

            }

            catch (System.Exception ex)

            {

                throw ex;

            }

        }

​

​

        public static string Decrypt(string stringToDecrypt)

        {

            stringToDecrypt.Replace(" ", "+");

            inputByteArray = new byte[stringToDecrypt.Length];

            ICryptoTransform decryptor = myR.CreateDecryptor(Key, IV);

            try

            {

                inputByteArray = Convert.FromBase64String(stringToDecrypt);

                MemoryStream ms = new MemoryStream();

                CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Write);

                cs.Write(inputByteArray, 0, inputByteArray.Length);

                cs.FlushFinalBlock();

                ASCIIEncoding encoding = new ASCIIEncoding();

                return encoding.GetString(ms.ToArray());

            }

            catch (System.Exception ex)

            {

                throw ex;

​

            }

        }

    }

    public static void Main()

    {

        Console.WriteLine(Encryption.Decrypt("N9hVy9uUESwJ3gHYnArRGA=="));

        Console.WriteLine(Encryption.Encrypt("somepassword"));

    }

}