using System;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        var query = "csharp -> golang";

        var key = Encoding.UTF8.GetBytes("12345678901234567890123456789012");

        var iv = Encoding.UTF8.GetBytes("1234567890123456");

        using (var aes = (RijndaelManaged)RijndaelManaged.Create())

        {

            aes.KeySize = 256;

            aes.Mode = CipherMode.CBC;

            aes.Key = key;

            aes.IV = iv;

            using (var transform = aes.CreateEncryptor())

            {

                Console.WriteLine("query => " + query);

                var toEncodeByte = Encoding.UTF8.GetBytes(query);

                Console.WriteLine("toEncodeByte = " + ToString(toEncodeByte));

                var encrypted = transform.TransformFinalBlock(toEncodeByte, 0, toEncodeByte.Length);

                Console.WriteLine("encrypted = " + ToString(encrypted));

            }

        }

    }

​

    public static string ToString(byte[] b)

    {

        return "[" + String.Join(" ", b.Select(h => h.ToString())) + "]";

    }

}