Enumerate the dictionary

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

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

        d.Add("One", 1);
        d["Two"] = 2; // adds to dictionary because "two" not already present 
        d["Two"] = 4;  // updates dictionary because "two" is now present 
        d["Three"] = 3;

        foreach (KeyValuePair<string, int> kv in d) //  One ; 1
            Console.WriteLine(kv.Key + "; " + kv.Value);  //  Two ; 22

        foreach (string s in d.Keys)
            Console.Write(s); // OneTwoThree
        
        foreach (int i in d.Values) 
            Console.Write(i); // 1223

    }
}