C# Randomizing multiple images in multiple picture boxes
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Hi guys i am trying to make a card game and facing some problems in distributing the 32 images of cards in 32 picture box but i cannot write my code on how to make the list of images by their names. I have tried my code using button as cards and randomly distribute them among the players and it was a success but when i am trying to do it in case of images i cant get it right I am posting my both code here.

    class CardsDeck
    {
        public static Random r = new Random();

        private static List<string> cards = new List<string>{ "♣ King", "♣ Queen", "♣ Jack", " ♣", "♣ 7", "♣ 8", "♣ 9", "♣ 10",
                                                              "♦ King", "♦ Queen", "♦ Jack", " ♦", "♦ 7", "♦ 8", "♦ 9", "♦ 10",
                                                              "♥ King", "♥ Queen", "♥ Jack", " ♥", "♥ 7", "♥ 8", "♥ 9", "♥ 10",
                                                              "♠ King", "♠ Queen", "♠ Jack", " ♠", "♠ 7", "♠ 8", "♠ 9", "♠ 10" };
        public string ReceiveCards()
        {
            if (cards.Count > 0)
            {
                int index = r.Next(cards.Count);
                var card = cards[index];
                cards.RemoveAt(index);
                return card;
            }
            else
            {
                return "";
            }
        }
    }

And in the Main Form 

    public partial class mainForm : Form
    {
        public mainForm()
        {
            InitializeComponent();

            CardsDeck cd = new CardsDeck();

            btnA1.Text = cd.ReceiveCards();
            btnA2.Text = cd.ReceiveCards();
            btnA3.Text = cd.ReceiveCards();
            btnA4.Text = cd.ReceiveCards();

            btnB1.Text = cd.ReceiveCards();
            btnB2.Text = cd.ReceiveCards();
            btnB3.Text = cd.ReceiveCards();
            btnB4.Text = cd.ReceiveCards();
            

            btnC1.Text = cd.ReceiveCards();
            btnC2.Text = cd.ReceiveCards();
            btnC3.Text = cd.ReceiveCards();
            btnC4.Text = cd.ReceiveCards();
            

            btnD1.Text = cd.ReceiveCards();
            btnD2.Text = cd.ReceiveCards();
            btnD3.Text = cd.ReceiveCards();
            btnD4.Text = cd.ReceiveCards();

            
   
        }

        private void btnTrump_Click(object sender, EventArgs e)
        {
            CardsDeck cd = new CardsDeck();

            
            btnA5.Text = cd.ReceiveCards();
            btnA6.Text = cd.ReceiveCards();
            btnA7.Text = cd.ReceiveCards();
            btnA8.Text = cd.ReceiveCards();

            btnB5.Text = cd.ReceiveCards();
            btnB6.Text = cd.ReceiveCards();
            btnB7.Text = cd.ReceiveCards();
            btnB8.Text = cd.ReceiveCards();

            btnC5.Text = cd.ReceiveCards();
            btnC6.Text = cd.ReceiveCards();
            btnC7.Text = cd.ReceiveCards();
            btnC8.Text = cd.ReceiveCards();
            
            btnD5.Text = cd.ReceiveCards();
            btnD6.Text = cd.ReceiveCards();
            btnD7.Text = cd.ReceiveCards();
            btnD8.Text = cd.ReceiveCards();
        }
    }

Now in this case i am trying to do it with images instead of doing with string but i cant get my code right. Can anyone please help me in this regard 

     class Card
    {
        public static Random r = new Random();

        PictureBox[] picBox = new PictureBox[32]

        public static Bitmap[] pictures = new Bitmap[32];
        // What should i write here??

        bool[] usedPictures = new bool[pictures.Length];
 

    }
    public string ReceiveCards()
    {
        int ICount = 0;
        while (iCount < pictures.Length)
        {
             int attempt = random.Next(0, pictures.Length);

             //Ensures you will only use an available picture
            if (usedPictures[attempt] == false)
            {            
                 picBox[attempt].Image= pictures[iCount];
                 doorUsed[attempt] = true;
                 iCount++;
          }
     } 

