private void Toast(string title,string content)
{
    ToastTemplateType toastTemplate = ToastTemplateType.ToastText02;//WindowsPhone上只支持这一种
    XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(toastTemplate);
    XmlNodeList toastTextElements = toastXml.GetElementsByTagName("text");
    toastTextElements[0].AppendChild(toastXml.CreateTextNode(title));
    toastTextElements[0].AppendChild(toastXml.CreateTextNode(content));
    ToastNotification toast = new ToastNotification(toastXml);
    ToastNotificationManager.CreateToastNotifier().Show(toast);
}