路由事件的宿主都是些拥有可视化实体的界面元素，而附加事件则不具备显示在用户界面上的能力。添加和移出附件事件的两个方法命名约定：

2、解除UI元素对附加事件侦听的包装器是名为Remove*Handler的public static方法，星号也是事件名称。

代码如下：

public class Student
{
    public int ID { get; set; }
    public string Name { get; set; }

    public static readonly RoutedEvent NameChangedEvent = EventManager.RegisterRoutedEvent("NameChanged", 
        RoutingStrategy.Bubble,
        typeof(RoutedEventHandler),
        typeof(Student));

    public static void AddNameChangedHandler(DependencyObject d, RoutedEventHandler h)
    {
        UIElement element = d as UIElement;
        if (element != null) element.AddHandler(Student.NameChangedEvent, h);
    }

    public static void RemoveNameChangedHandler(DependencyObject d, RoutedEventHandler h)
    {
        UIElement element = d as UIElement;
        if (element != null) element.RemoveHandler(Student.NameChangedEvent, h);
    }
}

WPF附加事件定义