using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

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

        Console.Write("How many numbers are you going to enter? ");

        int numberOfNumbers = PromptUserForNumber();

        for(int i = 0; i < numberOfNumbers; i++){

            numbers.Add(PromptUserForNumber());

        }

        foreach(int currentInteger in numbers){

            Console.WriteLine(currentInteger);

        }

    }

    public static int PromptUserForNumber(){

        bool invalidNumber = true;

        do{

            Console.Write("Please enter a number: ");

            string number1 = Console.ReadLine();

            int number1Parsed = 0;

            if(int.TryParse(number1, out number1Parsed)){

                return number1Parsed;

            } 

            else 

            {

                Console.WriteLine("You didn't enter a valid number.");

            }

        } while (invalidNumber);

        return 0;

    }

}