Deck class

Deck.cs

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

namespace HedgesBlackjack
{
    class Deck
    {
        private int _topCard = 51;
        private Card[] _deck = new Card[52];
        private Random r = new Random();

        public Deck()
        {
            int x = 0;
            for (int k = 2; k < 15; k++)
            {
                for (int j = 1; j < 5; j++)
                {
                     _deck[x] = new Card((Suits)j, k);
                     x++;
                }
            }
        }
        public Deck Shuffle()
        {
            Card temp;
            int x;
            for (int i = _deck.Length; i > 0; i--)
            {
                x = r.Next(0, i);
                temp = _deck[x];
                _deck[x] = _deck[i - 1];
                _deck[i - 1] = temp;

            }
            return this;
        }
        public Card Draw()
        {
            Card c = _deck[_topCard];
            _topCard--;
            return c;
        }

        public void AddCard(Card c)
        {
            _topCard++;
            _deck[_topCard] = c;
        }
    }
}