如何检查服务总线主题是否为空c#

using Microsoft.Azure.ServiceBus;

public bool IsServiceBusTopicEmpty(string connectionString, string topicName)
{
    var client = new TopicClient(connectionString, topicName);
    var messageReceiver = new MessageReceiver(connectionString, EntityNameHelper.FormatSubscriptionPath(topicName, SubscriptionClient.DefaultSubscriptionName), ReceiveMode.PeekLock);

    try
    {
        var messageCount = client.GetTopicRuntimeInfoAsync().GetAwaiter().GetResult().MessageCount;
        var receiverRuntimeInfo = messageReceiver.GetRuntimeInformationAsync().GetAwaiter().GetResult();
        var activeMessageCount = receiverRuntimeInfo.MessageCountDetails.ActiveMessageCount;

        return (messageCount == 0 && activeMessageCount == 0);
    }
    finally
    {
        client.CloseAsync().GetAwaiter().GetResult();
        messageReceiver.CloseAsync().GetAwaiter().GetResult();
    }
}