// Online C# Editor for free

// Write, Edit and Run your C# code using C# Online Compiler

using System;

using System.Text;

public class HelloWorld

{

    public static void Main(string[] args)

    {

           Obfuscate("1345542");

    }

​

   public static void Obfuscate(string input)

    {

   byte key = 0x8C;

        byte[] bytes = Encoding.UTF8.GetBytes(input);

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

        {

            bytes[i] = (byte)(bytes[i] ^ key);

        }

       Console.WriteLine(Convert.ToBase64String(bytes));

       Deobfuscate(Convert.ToBase64String(bytes),  key);

    }

    public static void Deobfuscate(string obfuscated, byte key)

    {

        byte[] bytes = Convert.FromBase64String(obfuscated);

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

        {

            bytes[i] = (byte)(bytes[i] ^ key);

        }

        Console.WriteLine(Encoding.UTF8.GetString(bytes));

    }

​

}

​