using System;

using System.Linq.Expressions;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Random r = new Random();

        Dictionary<int, object> listDict = new Dictionary<int, object>();

        bool done = false;

        do

        {

            var rVal = r.Next(1, 10);

            Console.WriteLine("rVal = {0}", rVal);

            if(!listDict.ContainsKey(rVal))

            {

                listDict[rVal] = null;

                Console.WriteLine("Count = {0}", listDict.Keys.Count);

                foreach(KeyValuePair<int, object> kvp in listDict)

                {

                    Console.WriteLine("Key: {0}", kvp.Key);

                }

            }

            done = (listDict.Keys.Count == 9);

        } while(!done);

        Console.WriteLine("All  Done!");

    }

}