如何读取服务总线主题死信队列c#？

下面的代码可以很好地读取服务总线队列死信，但对于主题，即使在更改路径后，抛出异常路径也不正确

string path= "QueueName";

MessagingFactory messageFactory = MessagingFactory.CreateFromConnectionString("ConnecitonString");

MessageReceiver deadletterReceiver = await         messageFactory.CreateMessageReceiverAsync(QueueClient.FormatDeadLetterPath(path), ReceiveMode.PeekLock);

MessageSender sender = await messageFactory.CreateMessageSenderAsync(path);

BrokeredMessage deadLetter = await deadletterReceiver.ReceiveAsync(TimeSpan.Zero);
if (deadLetter != null)
{

现在我想对服务总线主题死信做同样的事情 所以路径应该是-

topicName/subscriptionName

 string path= "TopicName/SubscriptionName";

    MessagingFactory messageFactory = MessagingFactory.CreateFromConnectionString("ConnecitonString");

    MessageReceiver deadletterReceiver = await messageFactory.CreateMessageReceiverAsync(TopicClient.FormatDeadLetterPath(path), ReceiveMode.PeekLock);

    MessageSender sender = await messageFactory.CreateMessageSenderAsync(path);

    BrokeredMessage deadLetter = await deadletterReceiver.ReceiveAsync(TimeSpan.Zero);
    if (deadLetter != null)
    {

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获取异常路径不正确…

主题没有死信队列，订阅有。您需要使用什么方法，传递主题和订阅名称