using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var d = new Dictionary<string, int>();

        d.Add("aze", 3);

        d.Add("qsd", 4);

        IReadOnlyDictionary<string, int> ro = d;

        Dictionary<string, int> dd = (Dictionary<string, int>)ro;

        dd.Add("wxc", 5);

        Console.WriteLine(d);

    }

}