Hangman V1

/*
 * Created by SharpDevelop.
 * User: Admin
 * Date: 21.1.2022 г.
 * Time: 9:15
 *
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO;

namespace besenica
{
    /// <summary>
    /// Description of MainForm.
    /// </summary>
    public partial class MainForm : Form
    {
        public string[] words;
        public string pcWord = "";
        List<string> activeWord = new List<string>();
        List<string> wrongLetters = new List<string>();
        string[] pictures = {"hang1.png", "hang2.png",
            "hang3.png", "hang4.png", "hang5.png", "hang6.png",
            "hang7.png", "hang8.png", "hang9.png", "hang10.png"};
        int pictureIndex = 0;

        public MainForm()
        {
            //
            // The InitializeComponent() call is required for Windows Forms designer support.
            //
            InitializeComponent();

            //
            // TODO: Add constructor code after the InitializeComponent() call.
            //
        }
        void MainFormLoad(object sender, EventArgs e)
        {
            words = File.ReadAllLines("words.txt");

        }
        void ButtonNewGameClick(object sender, EventArgs e)
        {
            activeWord.Clear();
            wrongLetters.Clear();
            labelWrongLetters.Text = "";
            pictureBox1.Image = null;
            pictureIndex = 0;
            textBoxLetter.Enabled = true;
            buttonCheck.Enabled = true;

            Random r = new Random();
            int index = r.Next(0, words.Length);
            pcWord = words[index];

            for (int i = 0; i < pcWord.Length; i++)
            {
                activeWord.Add(" _ ");
            }

            labelWord.Text = string.Join("", activeWord);
        }

        void ButtonCheckClick(object sender, EventArgs e)
        {
            string letter = textBoxLetter.Text.ToLower();

            if (letter.Length != 1)
            {
                MessageBox.Show("Въведи буква");
                textBoxLetter.Text = "";
                return;
            }

            if (char.Parse(letter) < 'а'|| char.Parse(letter) > 'я')
            {
                MessageBox.Show("Буквата трябва да е между А и Я");
                textBoxLetter.Text = "";
                return;
            }

            textBoxLetter.Text = "";

            bool isPresent = false;

            for (int i = 0; i < pcWord.Length; i++)
            {
                if (char.Parse(letter) == pcWord[i])
                {
                    activeWord[i] = " " + letter + " ";
                    isPresent = true;
                }
            }

            labelWord.Text = string.Join("", activeWord);

            if (!isPresent)
            {
                if (!wrongLetters.Contains(letter))
                {
                    wrongLetters.Add(letter);
                    labelWrongLetters.Text = string.Join(", ", wrongLetters);
                    pictureBox1.Image = Image.FromFile(pictures[pictureIndex]);
                    pictureIndex++;
                    if (pictureIndex >= 10)
                    {
                        textBoxLetter.Enabled = false;
                        buttonCheck.Enabled = false;
                        MessageBox.Show("Губите");
                        return;
                    }
                }
            }
        }
    }
}