Arena.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace MatchingGame
{
    public partial class Arena : Form
    {
        Label firstClicked = null;
        Label secondClicked = null;


        Random random = new Random();

        List<string> icons = new List<string>()
        {
            "!", "!", "U", "U", "C", "C", "A", "A",
            "b", "b", "k", "k", "M", "M", "1", "1"
        };

        public Arena()
        {
            InitializeComponent();
            AssignIconsToSquares();
        }

        private void AssignIconsToSquares()
        {

            foreach (Control control in tableLayoutPanel1.Controls)
            {
                Label iconLabel = control as Label;
                if (iconLabel != null)
                {
                    int randomNumber = random.Next(icons.Count);
                    iconLabel.Text = icons[randomNumber];

                    iconLabel.ForeColor = iconLabel.BackColor;

                    icons.RemoveAt(randomNumber);
                }

            }
        }

        private void label_click(object sender, EventArgs e)
        {
            if (timer1.Enabled == true)
                return;


            Label clickedLabel = sender as Label;

            if (clickedLabel != null)
            {
                if (clickedLabel.ForeColor == Color.Black)
                    return;

                //clickedLabel.ForeColor = Color.Black;

                if (firstClicked == null)
                {
                    firstClicked = clickedLabel;
                    firstClicked.ForeColor = Color.Black;

                    return;
                }
                secondClicked = clickedLabel;
                secondClicked.ForeColor = Color.Black;

                CheckForWinner();

                if (firstClicked.Text == secondClicked.Text)
                {
                    firstClicked = null;
                    secondClicked = null;
                    return;
                }

                timer1.Start();
            }
        }

        private void Timer1_Tick(object sender, EventArgs e)
        {
            timer1.Stop();
            firstClicked.ForeColor = firstClicked.BackColor;
            secondClicked.ForeColor = secondClicked.BackColor;
            firstClicked = null;
            secondClicked = null;
        }

        private void CheckForWinner()
        {
            foreach (Control control in tableLayoutPanel1.Controls)
            {
                Label iconLabel = control as Label;

                if (iconLabel != null)
                {
                    if (iconLabel.ForeColor == iconLabel.BackColor)
                        return;
                }
            }

            MessageBox.Show("You matched every icon! Such a winner, you.");
            Close();

        }
    }
}