using System;

using System.Collections.Generic;

public class Program

{

​

    public static void Main()

    {

        Dictionary<int, int> openWith = new Dictionary<int, int>();

        List<int> list = new List<int>();

        Random rnd = new Random();

        Random prize = new Random();

        while(list.Count <= 9){

            int num = rnd.Next(1, 21);

            int num2 = rnd.Next(1, 10001);

            if (!openWith.ContainsKey(num)){

                openWith.Add(num, num2);

                Console.WriteLine(num);

                list.Add(num);

            }

        }   

            Console.WriteLine("Please input integers: (a number from 1 to 20)");

        string input = Console.ReadLine();

        List<int> outoflist = new List<int>();

        for(int j=1;j<21;j++){

            if (!openWith.ContainsKey(j)){

                outoflist.Add(j);

            }

        }

        int max = 0;

        int maxv;

        int maxkey = 0;

        for(int j=1;j<21;j++){

            if(openWith.TryGetValue(j, out maxv)){

                if(maxv > max){

                max = maxv;

                maxkey = j;

                }

            }

        }

        int value2;

        int num3;

        int.TryParse(input,out num3);

        if(openWith.TryGetValue(num3, out value2)){

            Console.WriteLine("You earned {0} dollars!",value2);

            Console.WriteLine("You are lucky! You could have lost if you guessed the following numbers:");

            foreach (int name in outoflist){

                Console.WriteLine("{0}", name);

            }

        }

        else{

            Console.WriteLine("BANG! You die!");

            Console.WriteLine("You are unlucky! If you guessed {0}, you would have won the most money!", maxkey);

        }

    }

}

​