wpf 控件复制 克隆

方法1：

 string xaml = System.Windows.Markup.XamlWriter.Save(rtb1);
  RichTextBox rtb2 =System.Windows.Markup.XamlReader.Parse(xaml) as RichTextBox;

方法2：

 Rectangle rect = new Rectangle();
    rect = data.GetData(typeof(Rectangle)) as Rectangle;
    //canvas2.Children.Remove(rect);
    //canvas1.Children.Add(rect);
    //序列化Control,以深复制Control!!!!
    string rectXaml = XamlWriter.Save(rect);
    StringReader stringReader = new StringReader(rectXaml);
    XmlReader xmlReader = XmlReader.Create(stringReader);
    UIElement clonedChild = (UIElement)XamlReader.Load(xmlReader);
    canvas1.Children.Add(clonedChild);