using System;

using System.Web;

public class Program

{

    public static void Main()

    {

        string org = "!@#$%^&*()A1a";

        string enc = HttpUtility.UrlEncode(org);

        Console.WriteLine("Encoded: " + enc);

        string dec = HttpUtility.UrlDecode(enc);

        Console.WriteLine("Decoded: " + dec);

    }

}