wpf动态创建控件并删除（关闭），创建窗口元素容器

        private void OpenPhoneNumber()
        {
            PhoneNumber p = new PhoneNumber();
            p.Margin = new Thickness { Left = 20, Top = 20 };
            grid.Children.Add(p);
            grid.RegisterName("PhoneNumber", p);
        }

        private void ClosePhoneNumber()
        {
            var p = grid.FindName("PhoneNumber") as PhoneNumber;
            if (p != null)
            {
                grid.Children.Remove(p);
                grid.UnregisterName("PhoneNumber");
            }
        }

            Button b1 = new Button();
            b1.Content = "abcd";
            
            Canvas cv = new Canvas();
            Canvas cv2 = new Canvas();
            cv2.Children.Add(b1);
            Canvas.SetTop(cv2, 20);
            cv.Children.Add(cv2);

            Menu m = new Menu();
            m.Height = 20;
            MenuItem mi = new MenuItem();
            mi.Header = "m1";
            MenuItem mi2 = new MenuItem();
            mi2.Header = "m2";
            mi.Items.Add(mi2);
            m.Items.Add(mi);
            cv.Children.Add(m);
            w1.Content = cv;

总比没有的好！