请用C#写贪吃蛇游戏

以下是使用C#编写的简单贪吃蛇游戏代码，仅供参考：

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

namespace ConsoleApp1
{
    class Program
    {
        static int width = 20;
        static int height = 20;
        static int score = 0;
        static int[,] grid = new int[width, height];
        static List<Point> snake = new List<Point>();
        static Point food = new Point();
        static Random rnd = new Random();

        static void Main(string[] args)
        {
            InitGame();

            while (true)
            {
                DrawGrid();
                DrawSnake();
                DrawFood();
                MoveSnake();
                if (CheckCollision())
                {
                    Console.Clear();
                    Console.WriteLine("Game over!");
                    Console.WriteLine("Score: " + score);
                    Console.ReadKey();
                    break;
                }
                Thread.Sleep(100);
            }
        }

        static void InitGame()
        {
            snake.Add(new Point(width / 2, height / 2));
            grid[snake[0].x, snake[0].y] = 1;
            food = GenerateFood();
        }

        static void DrawGrid()
        {
            Console.Clear();
            for (int i = 0; i < height + 2; i++)
            {
                for (int j = 0; j < width + 2; j++)
                {
                    if (i == 0 || i == height + 1 || j == 0 || j == width + 1)
                        Console.Write("#");
                    else
                        Console.Write(" ");
                }
                Console.WriteLine();
            }
            Console.WriteLine("Score: " + score);
        }

        static void DrawSnake()
        {
            foreach (Point p in snake)
            {
                Console.SetCursorPosition(p.x + 1, p.y + 1);
                Console.Write("*");
            }
        }

        static void DrawFood()
        {
            Console.SetCursorPosition(food.x + 1, food.y + 1);
            Console.Write("@");
        }

        static void MoveSnake()
        {
            Point head = new Point(snake[0].x, snake[0].y);
            switch (Console.ReadKey().Key)
            {
                case ConsoleKey.LeftArrow:
                    head.x--;
                    break;
                case ConsoleKey.RightArrow:
                    head.x++;
                    break;
                case ConsoleKey.UpArrow:
                    head.y--;
                    break;
                case ConsoleKey.DownArrow:
                    head.y++;
                    break;
            }
            snake.Insert(0, head);
            if (head.x == food.x && head.y == food.y)
            {
                score++;
                food = GenerateFood();
            }
            else
            {
                snake.RemoveAt(snake.Count - 1);
            }
        }

        static bool CheckCollision()
        {
            if (snake[0].x == 0 || snake[0].x == width + 1 || snake[0].y == 0 || snake[0].y == height + 1)
                return true;
            for (int i = 1; i < snake.Count; i++)
            {
                if (snake[0].x == snake[i].x && snake[0].y == snake[i].y)
                    return true;
            }
            return false;
        }

        static Point GenerateFood()
        {
            Point p = new Point(rnd.Next(1, width + 1), rnd.Next(1, height + 1));
            while (grid[p.x, p.y] == 1)
            {
                p.x = rnd.Next(1, width + 1);
                p.y = rnd.Next(1, height + 1);
            }
            return p;
        }

        class Point
        {
            public int x;
            public int y;

            public Point(int x, int y)
            {
                this.x = x;
                this.y = y;
            }
        }
    }
}