using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

            keyValCollactionDictionary.Add(1, "one");

            keyValCollactionDictionary.Add(2, "two");

​

            Hashtable keyValueCollactionHashTable = new Hashtable();

            keyValueCollactionHashTable.Add(1, "one");

            keyValueCollactionHashTable.Add("two", 2);

    }

}