CardsHeap

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Cards
{
    class Heap
    {
        public static void Initialize(int[] cards)
        {
            for (int i = 0; i < cards.Length; i++)
                cards[i] = 0;
        }
        public static void InputInitialize(int[] cards, int n)
        {
            for (int i = 0; i <n; i++)
                cards[i] = int.Parse(Console.ReadLine());
        }
        public static void RandomInitializer(int[] cards, int n)
        {
            Random rnd = new Random();
            for (int i = 0; i < n; i++)
                cards[i] = rnd.Next(1, 14);
        }
        public static void AddCard(int[] cards, int card)
        {
            int n = 0;
            while (cards[n] != 0)
                n++;
            cards[n] = card;
        }
        public static int DrawCard(int[] cards)
        {
            int tmp = cards[0];
            for (int i = 0; i < cards.Length - 1; i++)
                cards[i] = cards[i + 1];
            cards[cards.Length - 1] = 0;
            return tmp;
        }
        public static bool Empty(int[] cards)
        {
            for (int i = 0; i < cards.Length; i++)
            {
                if (cards[i] != 0)
                    return false;
            }
            return true;
        }
    }
}

***************

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Cards
{
    class Program
    {
        static void Main(string[] args)
        {
            int playerOneCard, playerTwoCard;
            int[] heapOne, heapTwo;
            heapOne = new int[52];
            heapTwo = new int[52];
            Heap.Initialize(heapOne);
            Heap.RandomInitializer(heapOne, 26);
            Heap.Initialize(heapTwo);
            Heap.RandomInitializer(heapTwo, 26);
            while(!Heap.Empty(heapOne) && !Heap.Empty(heapTwo))
            {
                playerOneCard = Heap.DrawCard(heapOne);
                playerTwoCard = Heap.DrawCard(heapTwo);
                if(playerOneCard > playerTwoCard)
                {
                    Heap.AddCard(heapOne, playerOneCard);
                    Heap.AddCard(heapOne, playerTwoCard);
                }
                else
                {
                    Heap.AddCard(heapTwo, playerTwoCard);
                    Heap.AddCard(heapTwo, playerOneCard);
                }
            }
            if(Heap.Empty(heapOne))
                Console.WriteLine("Winner is player two!");
            else
                Console.WriteLine("Winner is player one!");
        }
    }
}