如果(picturebox.Right==panel.Right)不起作用，但如果(picture box.Left==

我不知道为什么，但每当我处理冲突时，控件的顶部和左侧属性似乎一切都很好，但右侧和底部属性则不然。我不确定是不是因为它们是只读属性，但请有人帮忙。

代码在这里

操场（小组）

    namespace final_pong_game_phase_3
{
class PlayGround
{
    public Panel Panel;
    Size PlayGroundSize;
    public int Top;
    public int Bottom;
    public int Right;
    public int Left;
    public PlayGround(Panel panel,Size size, Point location)
    {
        this.Panel = panel;
        this.PlayGroundSize = size;
        this.Panel.Size = this.PlayGroundSize;
        this.Panel.BackColor = Color.Black;
        this.Panel.Location = location;
        this.Panel.SendToBack();
        this.Top = panel.Top;
        this.Bottom = panel.Bottom;
        this.Right = panel.Right;
        this.Left= panel.Left;
    }

}
} 

球（图片盒）类

    namespace final_pong_game_phase_3
  {
class Ball
{
    Size BallSize;
    Point Location;
    int TopSpeedInterval;
    int LeftSpeedInterval;
    PictureBox BallGraphic;
    public int Top;
    public int Left;
    public int Bottom;
    public int Right;
    public Ball(Point location, int topspeedinterval,int leftspeedinterval, Size ballsize, PictureBox ballgraphic)
    {
        this.Location = location;
        this.TopSpeedInterval = topspeedinterval;
        this.LeftSpeedInterval = leftspeedinterval;
        this.BallSize = ballsize;
        this.BallGraphic = ballgraphic;
        this.BallGraphic.Location = this.Location;
        this.BallGraphic.BackColor = Color.White;
        this.BallGraphic.Size = this.BallSize;
        this.BallGraphic.BringToFront();
        this.Top = BallGraphic.Top;
        this.Left = BallGraphic.Left;
        this.Bottom = ballgraphic.Bottom;
    } 
    public void start()
    {
        Top -= TopSpeedInterval;
        Left -= LeftSpeedInterval;
        BallGraphic.Top = Top;
        BallGraphic.Left = Left;
        Bottom = BallGraphic.Bottom;
        Right = BallGraphic.Right;

    } 
    public void SwitchTopDirection()
    {
        TopSpeedInterval *=-1; 
    } 
    public void SwitchLeftDirection()
    {
        LeftSpeedInterval *= -1;
    } 
    public void Hit()
    {
        TopSpeedInterval+= 5;
        LeftSpeedInterval+= 5;
    }
}
 } 

GameWorld（控制和监控游戏，类的方法中的一切都会在每次计时器滴答作响时发生）类

    //ball to wall collision 
        if (playground.Top == ball.Top)
        {
            ball.SwitchTopDirection();
            Console.Beep(1000, 100);
        }
        if (playground.Left == ball.Left)
        {
            Console.Beep(1500, 700);
            MessageBox.Show("Player 2 Wins!!!");
        }
        if (playground.Right == ball.Right)
        {
            MessageBox.Show("Player 2 Wins!!!");
        }
        if (ball.Bottom >= playground.Bottom)
        {
            ball.SwitchTopDirection();
            Console.Beep(1000, 100);
        }

if (Math.Abs(playground.Right - ball.Right)<=7)
{
    MessageBox.Show("Player 2 Wins!!!");
}