Console.ForegroundColor = ConsoleColor.Yellow; //设置文字颜色为绿色
Console.BackgroundColor = ConsoleColor.Red; //设置背景颜色为黑色
Console.SetWindowSize(50, 25);
Console.SetBufferSize(50, 25);
Console.CursorVisible = false;
try
{
    char dis;
    int x=0, y=0;
    while (true)
    {
        Console.Clear();
        Console.SetCursorPosition(x, y);
        Console.Write("■");
        dis = Console.ReadKey(true).KeyChar;
        switch (dis)
        {
            case 'w':
            case 'W':
                y--;
                if (y < 0)
                {
                    y = 0; //防止光标位置小于0
                }
                break;
            case 'a':
            case 'A':
                x -= 2;
                if (x < 0)
                {
                    x = 0; //防止光标位置小于0
                }
                break;
            case 's':
            case 'S':
                y++;
                if (y > Console.BufferHeight - 1)
                {
                    y = Console.BufferHeight - 1; //防止光标位置超过缓冲区高度
                }
                break;
            case 'd':
            case 'D':
                x += 2;
                if ( x > Console.BufferWidth - 2)
                {
                    x = Console.BufferWidth - 2;
                    
                }
                break;
        }
        
        
        
        
    }
            
}catch (Exception ex)
{
    Console.WriteLine($"发生异常: {ex.Message}");
}
finally
{
    Console.ResetColor(); //重置颜色为默认颜色
    Console.Clear(); //清空控制台内容
    Console.WriteLine("程序结束");
    Environment.Exit(0);
}