/*

This code will: 

1. Sequentially load numbers for 1 to x in to and array,

2. Once loaded randomly shuffle that array.

3. Print out the shuffled array formatted with leading zeros.

​

*/

using System;

using System.Collections;

public class Program

{

    // Load cards

    private static ArrayList LoadDeck(int max)

    {

        // Create my card deck

        ArrayList cardDeck = new ArrayList();

        // Create unique cards in sequential order to ensure no duplicates are created.

        for (int i = 1; i < (max + 1); i++) 

        {

            cardDeck.Add(i);

        }

        return cardDeck;

    }

    // Shuffle cards

    private static ArrayList ShuffleDeck(ArrayList deck)

    {

        ArrayList shuffledDeck = new ArrayList();

        Random generator = new Random();

​

        // Shuffle

        while (deck.Count > 0)

        {

            int position = generator.Next(deck.Count);

            shuffledDeck.Add(deck[position]);

            deck.RemoveAt(position);

        }

​

        return shuffledDeck;

    }

    // Deal cards

    private static void DealCards(int numberOfCards)

    {

        // Call LoadDeck() to load shuffled cards

        ArrayList cardDeck = LoadDeck(numberOfCards);

        // Call ShuffleDeck() to shuffle my deck

        ArrayList shuffledDeck = ShuffleDeck(cardDeck);

        // Deal cards

        foreach(int card in shuffledDeck)

        {

            // Set leading zero for uniformity

            Console.WriteLine(card.ToString("00000"));

        }

    }

    // Client

    public static void Main()

    {

        int cardCnt = 10000;

        DealCards(cardCnt);

    }

}