using System;

using System.Collections.Generic;

​

​

public class Program

{

    public static void Main()

    {

        // Create Dictionary

        Dictionary <int, string> dict = new Dictionary<int, string>(){

                                                    {0,"One"},

                                                    {1, "Two"},

                                                    {2,"Three"}

                                                };

        // Get dictionary size

        var dictionarySize = dict.Count;

        // Create random number from 0 to dictionary size

        var rand = new Random();

        int randomNumber = rand.Next(dictionarySize);  

​

        // Get dictionary value based on random key

        var dictionaryKeyValuePair = dict[randomNumber];

        Console.WriteLine("Value from dictionary for " + randomNumber.ToString() + " equals " + dictionaryKeyValuePair); // returns Two

    }

}