如何将谷歌云平台发布/订阅消息推送到C#桌面应用

using Google.Cloud.PubSub.V1;
using Google.Protobuf;

public class PubSubClient
{
    private readonly PublisherClient publisher;

    public PubSubClient()
    {
        // 使用谷歌云平台的认证凭据连接到 Pub/Sub 服务
        GoogleCredential credential = GoogleCredential.FromFile("path/to/service-account-key.json");
        Channel channel = new Channel(PublisherClient.DefaultEndpoint.Host, PublisherClient.DefaultEndpoint.Port, credential.ToChannelCredentials());
        publisher = PublisherClient.Create(channel);
    }

    public void PublishMessage(string topicId, string message)
    {
        // 发布消息到指定的主题
        ByteString data = ByteString.CopyFromUtf8(message);
        publisher.Publish(topicId, new[] { new PubsubMessage { Data = data } });
    }
}

PubSubClient pubSubClient = new PubSubClient();
pubSubClient.PublishMessage("your-topic-id", "Hello, Google Cloud Pub/Sub!");