WPF控件和窗体一起放大一起缩小

        Rect rcnormal;
        private void btMinWindow_Click(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Minimized;
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.btnMaximize.Visibility = Visibility.Collapsed;//使最大化图标隐藏
            this.btnNormal.Visibility = Visibility.Visible;//使还原图标显示
            this.rcnormal = new Rect(this.Left, this.Top, this.Width, this.Height);//保存下当前位置与大小
            Rect rc = SystemParameters.WorkArea;//获取工作区大小
                                                // this.BorderThickness = new Thickness(0, 0, 0, 0);//隐藏阴影
                                                // 经过试验，发现window最多可以比屏幕大一圈，10像素左右，再多就不能显示了
            this.Left = -10;//设置位置
            this.Top = -10;
            this.Width = rc.Width + 22;
            this.Height = rc.Height + 20;
        }
        private void btnNormal_Click(object sender, RoutedEventArgs e)
        {
            //this.BorderThickness = new Thickness(24, 24, 24, 24);//显示阴影
            this.Left = rcnormal.Left;
            this.Top = rcnormal.Top;
            this.Width = rcnormal.Width;
            this.Height = rcnormal.Height;
            this.btnMaximize.Visibility = Visibility.Visible;
            this.btnNormal.Visibility = Visibility.Collapsed;
        }
        private void btnX_Click(object sender, RoutedEventArgs e)
        {
            Environment.Exit(0);
        }