How to iterate over any Map in C#

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

d.Add("keyboard", 1);
d.Add("mouse", 2);

var val = d.Keys.ToList();

foreach (var key in val) {
   Console.WriteLine(key);
}

using System;
using System.Collections.Generic;
using System.Linq;

class Program {
   static void Main() {
      Dictionary<string, int> d = new Dictionary<string, int>();

      d.Add("keyboard", 1);
      d.Add("mouse", 2);

      // get keys
      var val = d.Keys.ToList();

      // sort
      val.Sort();

      // displaying sorted keys
      foreach (var key in val) {
         Console.WriteLine(key);
      }
   }
}

keyboard
mouse