using System;

    using System.Collections.Generic;

public class Countries

{

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello Dictionary");

        Dictionary<string, string>  countr = new Dictionary<string, string>();

        countr.Add("Nl", "Nederland");

        countr.Add("It", "Italy");

        countr.Add("usa", "united states");

        countr.Add("sp", "Espagne");

        Console.WriteLine(countr["Nl"]);

        Console.WriteLine(countr["sp"]);

        countr.Remove("usa");

        if (!countr.ContainsValue("united states"))

            {   Console.WriteLine("het land is niet meer aanwezig in de lijst ");

            }

        countr.Add("usa", "united states");

        countr["usa"] = "United states of amerika  ";  // value is changed .

        Console.WriteLine( countr["usa"] );

        Console.WriteLine("===================================");

        foreach (KeyValuePair<string, string> count in countr)

        {

        Console.WriteLine("key : "+ count.Key  + ", Value : " + count.Value );  

        }

    //  countr.

    }

}