using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

        d.Add(1, "hi");

        d.Add(2, "Yo");

        var t = new List<Tuple<int, string>>();

        t.Add(new Tuple<int, string>(1, "hi"));

        t.Add(new Tuple<int, string>(1, "yo"));

        foreach (var tu in t) {

            Console.WriteLine($"{tu.Item1} - {tu.Item2}");  

        }

        foreach (var e in d) {

            Console.WriteLine($"{e.Key} - {e.Value}");  

        }

    }

}