using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

        //add items in dictionary

        dictionary.Add("linux", 1);

        dictionary.Add("windows", 2);

        dictionary.Add("mac", 3);

        //Get value using Key

        int result;

​

        if(dictionary.TryGetValue("windows", out result))

        {

            Console.WriteLine(result);

        }

        else

        {

            Console.WriteLine("Could not find the specified key.");

        }

    }

}