我正在使用 EWSStreamingSubscription在收件箱上创建一个。它正在监听NewMail事件。我可以提取发件人地址、主题、正文、收件人地址、抄送地址，但不能提取密件抄送地址。有什么办法可以看到这个列表吗？
代码：
static void OnEvent(object sender, NotificationEventArgs args)
{
String from = null;
String subject = null;
String body = null;
String to = null;
StreamingSubscription subscription = args.Subscription;
// Loop Through All Item-Related Events
foreach (NotificationEvent notification in args.Events)
{
ItemEvent item = (ItemEvent)notification;
PropertySet propertySet = new PropertySet(ItemSchema.UniqueBody);
propertySet.RequestedBodyType = BodyType.Text;
propertySet.BasePropertySet = BasePropertySet.FirstClassProperties;
// Parse Email
EmailMessage message = EmailMessage.Bind(service, item.ItemId, propertySet);
from = message.From.Address;
subject = message.Subject;
body = message.Body.Text;
if (message.ToRecipients.Count > 0)
{
to = message.ToRecipients[0].Address;
body += "\n TO FIELD";
}
else if (message.CcRecipients.Count > 0)
{
to = message.CcRecipients[0].Address;
body += "\n CC FIELD";
}
/************** Does not work! BccRecipients is always empty *****************/
else if (message.BccRecipients.Count > 0)
{
to = message.BccRecipients[0].Address;
body += "\n BCC FIELD";
}
/************* REST OF CODE ************************/
}
}