如何取得某个菜单所绑定的所有事件处理程序

ToolStripItem item = sender as ToolStripItem;

PropertyInfo propertyInfo = (typeof(ToolStripItem)).GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
EventHandlerList eventHandlerList = (EventHandlerList)propertyInfo.GetValue(item, null);
FieldInfo fieldInfo = (typeof(ToolStripItem)).GetField("EventClick", BindingFlags.Static | BindingFlags.NonPublic);
Delegate d = eventHandlerList[fieldInfo.GetValue(null)];
if (d != null)
{
    foreach (Delegate temp in d.GetInvocationList())
    {

//这里已经取得了所有Click事件绑定的处理程序，可以做一些事情。例如下面的代码是撤销所有的事件注册
        item.Click -= temp as EventHandler;
    }
}