如何在Umbraco默认弹出窗口中发送错误消息?

我将发布事件链接为:

protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
{
   ContentService.Published += ContentService_Published;
}
private void ContentService_Published(global::Umbraco.Core.Publishing.IPublishingStrategy sender, PublishEventArgs<IContent> e)
{
 // My code , Send Error
}

当用户“保存并发布”内容时,我想用自定义错误消息显示umbraco默认错误弹出窗口。

提前谢谢。