RSA Demo - toi uu code de nhin hon

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace RSA_Demo
{
    class RSA_Test1
    {
        public void GenRSA()
        {
            try
            {
                #region Sinh khoa
                RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
                // Export public key
                string publicKey = rsaProvider.ToXmlString(false);
                // Export private/public key pair
                string privateKey = rsaProvider.ToXmlString(true);
                // in ra man hinh
                Console.WriteLine("private key----------------");
                Console.WriteLine(privateKey);
                Console.WriteLine("public key-----------------");
                Console.WriteLine(publicKey);
                // Ban ro
                string _message = "Noi dung ban ro";
                Console.WriteLine("Message: ");
                Console.WriteLine(_message);
                #endregion

                #region ma hoa
                byte[]  plainBytes = Encoding.Unicode.GetBytes(_message);
                byte[]  encryptedBytes = rsaProvider.Encrypt(plainBytes, false);
                string encrypt_message = Encoding.UTF8.GetString(encryptedBytes);
                Console.WriteLine("encrypted...");
                Console.WriteLine(encrypt_message);
                #endregion

                #region giai ma
                byte[] decryptedBytes = rsaProvider.Decrypt(encryptedBytes, false);
                string decrypted_string = Encoding.Unicode.GetString(decryptedBytes);
                Console.WriteLine("decrypted...");
                Console.WriteLine(decrypted_string);
                #endregion

            }
            catch (Exception ex)
            {
                // Any errors? Show them
                Console.WriteLine("Exception generating a new key pair! More info:");
                Console.WriteLine(ex.Message);
            }
            Console.ReadKey();
        }
    }
}