C# 双击TableLayoutPanel中某个控件全屏显示，再次双击恢复原貌

程序中用到的TableLayoutPanel有两行两列，在(1,1)处有一picturebox

现在要实现双击该picturebox全屏显示（状态栏和菜单栏一起显示），代码：

        private void pictureBoxRealPlayView_DoubleClick(object sender, EventArgs e)
        {
            if (changed)
            {
                changed = false;
                tableLayoutPanel1.Controls.Add(pictureBoxRealPlayView);
                pictureBoxRealPlayView.Parent = tableLayoutPanel1;
                pictureBoxRealPlayView.Dock = DockStyle.Fill;
                tableLayoutPanel1.Show();
            }
            else
            {
                changed = true;                
                tableLayoutPanel1.Controls.Remove(pictureBoxRealPlayView);
                pictureBoxRealPlayView.Parent = this;
                pictureBoxRealPlayView.BringToFront();                
                pictureBoxRealPlayView.Dock = DockStyle.Fill;
                tableLayoutPanel1.Hide();
            }                        
        }