using System;

using System.Collections.Generic;

using System.Linq;

​

public static class Countries

{

    public static Dictionary<string, int> Get() {

        return new Dictionary<string, int>() {

            {"NL", 1},

            {"DE", 2}

        };

    }

}

​

public class Program

{

    public static void Main()

    {

        var countryCodeInt = Countries.Get().Single(c => c.Key == "NL").Value;

        Console.WriteLine(countryCodeInt);

    }

}