using System;

using System.Text;              

​

public class Program

{

    public static void Main()

    {

        var l = "TOENCODE";

        var bytes = Encoding.UTF8.GetBytes(l);

        Rotate(bytes);

        ("\"" + Convert.ToBase64String(bytes).Replace(new string((char)87, 1), "\", \"") + "\"").Dump();

    }

    static void Rotate(byte[] data)

    {

        for (int i = 0; i < data.Length; i++)

        {

            data[i] = (byte)(data[i] ^ (byte)i);

        }

    }

}