用c#编写飞机大战

以下是一个简单的C#飞机大战游戏代码示例，仅供参考：

using System;
using System.Drawing;
using System.Windows.Forms;

namespace PlaneGame
{
    public partial class MainForm : Form
    {
        private Graphics graphics;
        private Bitmap backBuffer;
        private Random random = new Random();

        private const int planeSpeed = 5;
        private const int bulletSpeed = 10;
        private const int enemySpeed = 3;
        private const int maxEnemyCount = 10;
        private const int maxBulletCount = 30;

        private Rectangle playerRect;
        private Point playerLocation;
        private Image playerImage;
        private Bullet[] bullets = new Bullet[maxBulletCount];
        private Enemy[] enemies = new Enemy[maxEnemyCount];

        private int score = 0;
        private bool gameOver = false;

        public MainForm()
        {
            InitializeComponent();
            InitializeGame();
        }

        private void InitializeGame()
        {
            backBuffer = new Bitmap(ClientSize.Width, ClientSize.Height);
            graphics = Graphics.FromImage(backBuffer);
            playerImage = Image.FromFile("player.png");
            playerLocation = new Point((ClientSize.Width - playerImage.Width) / 2, ClientSize.Height - playerImage.Height - 50);
            playerRect = new Rectangle(playerLocation, playerImage.Size);
            for (int i = 0; i < maxBulletCount; i++)
            {
                bullets[i] = new Bullet();
            }
            for (int i = 0; i < maxEnemyCount; i++)
            {
                enemies[i] = new Enemy(random.Next(ClientSize.Width));
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            graphics.Clear(BackColor);
            graphics.DrawImage(playerImage, playerLocation);
            foreach (Bullet bullet in bullets)
            {
                if (bullet.Visible)
                {
                    graphics.FillEllipse(Brushes.Red, bullet.Location.X, bullet.Location.Y, bullet.Size.Width, bullet.Size.Height);
                }
            }
            foreach (Enemy enemy in enemies)
            {
                if (enemy.Visible)
                {
                    graphics.DrawImage(enemy.Image, enemy.Location);
                }
            }
            if (gameOver)
            {
                graphics.DrawString("Game Over\nScore: " + score, Font, Brushes.Black, ClientSize.Width / 2 - 50, ClientSize.Height / 2 - 20);
            }
            else
            {
                graphics.DrawString("Score: " + score, Font, Brushes.Black, 10, 10);
            }
            e.Graphics.DrawImage(backBuffer, 0, 0);
        }

        private void MainForm_KeyDown(object sender, KeyEventArgs e)
        {
            if (!gameOver)
            {
                if (e.KeyCode == Keys.Left)
                {
                    playerLocation.X -= planeSpeed;
                }
                else if (e.KeyCode == Keys.Right)
                {
                    playerLocation.X += planeSpeed;
                }
                else if (e.KeyCode == Keys.Space)
                {
                    for (int i = 0; i < maxBulletCount; i++)
                    {
                        if (!bullets[i].Visible)
                        {
                            bullets[i].Visible = true;
                            bullets[i].Location = new Point(playerLocation.X + playerImage.Width / 2 - bullets[i].Size.Width / 2, playerLocation.Y);
                            break;
                        }
                    }
                }
                playerRect.Location = playerLocation;
                CheckCollision();
                Invalidate();
            }
        }

        private void MoveBullets()
        {
            foreach (Bullet bullet in bullets)
            {
                if (bullet.Visible)
                {
                    bullet.Location.Y -= bulletSpeed;
                    if (bullet.Location.Y < 0)
                    {
                        bullet.Visible = false;
                    }
                }
            }
        }

        private void MoveEnemies()
        {
            foreach (Enemy enemy in enemies)
            {
                if (enemy.Visible)
                {
                    enemy.Location.Y += enemySpeed;
                    if (enemy.Location.Y > ClientSize.Height)
                    {
                        enemy.Visible = false;
                    }
                }
            }
        }

        private void GenerateEnemies()
        {
            foreach (Enemy enemy in enemies)
            {
                if (!enemy.Visible && random.Next(100) < 5)
                {
                    enemy.Visible = true;
                    enemy.Location = new Point(random.Next(ClientSize.Width), -enemy.Image.Height);
                    break;
                }
            }
        }

        private void CheckCollision()
        {
            foreach (Bullet bullet in bullets)
            {
                if (bullet.Visible)
                {
                    foreach (Enemy enemy in enemies)
                    {
                        if (enemy.Visible && bullet.Bounds.IntersectsWith(enemy.Bounds))
                        {
                            bullet.Visible = false;
                            enemy.Visible = false;
                            score++;
                        }
                    }
                }
            }
            foreach (Enemy enemy in enemies)
            {
                if (enemy.Visible && enemy.Bounds.IntersectsWith(playerRect))
                {
                    gameOver = true;
                }
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            MoveBullets();
            MoveEnemies();
            GenerateEnemies();
            CheckCollision();
            Invalidate();
        }
    }

    public class Bullet
    {
        private Point location = new Point(0, 0);
        private Size size = new Size(10, 10);
        private bool visible = false;

        public Point Location { get => location; set => location = value; }
        public Size Size { get => size; set => size = value; }
        public bool Visible { get => visible; set => visible = value; }

        public Rectangle Bounds { get => new Rectangle(Location, Size); }
    }

    public class Enemy
    {
        private Point location = new Point(0, 0);
        private Image image = Image.FromFile("enemy.png");
        private bool visible = false;

        public Point Location { get => location; set => location = value; }
        public Image Image { get => image; set => image = value; }
        public bool Visible { get => visible; set => visible = value; }

        public Rectangle Bounds { get => new Rectangle(Location, Image.Size); }

        public Enemy(int x)
        {
            location.X = x;
        }
    }
}

需要注意的是，此代码示例仅是一个简单的飞机大战游戏，没有涉及到音效、难度等方面的调整。如果您希望开发更完整的飞机大战游戏，可以考虑增加游戏元素、美化游戏界面、优化游戏体验等方面。