从c＃调用watch（）时无效的主题名称

Question

我有一个拥有所有权限和订阅的主题。从谷歌云控制台我可以列出我的主题。但是从c＃代码或TRY IT页面获取无效的主题名称。我创建了一个项目 启用了pub / sub api 创建主题 创建订阅 获得许可 创建了api密钥 我从gmail收到未读邮件，这意味着密钥正常工作。但不能得到主题名称 这是我的代码：

using Google.Apis.Auth.OAuth2;
using Google.Apis.Gmail.v1;
using Google.Apis.Gmail.v1.Data;
using Google.Apis.Services;
using Google.Apis.Util.Store;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Google.Cloud.PubSub.V1;
namespace ConsoleApplication4
{
class Program
{
    static string[] Scopes = { GmailService.Scope.GmailReadonly };
    static string ApplicationName = "Gmail API .NET Quickstart";
    static void Main(string[] args)
    {

        UserCredential credential;

        using (var stream =
            new FileStream("client_secret2.json", FileMode.Open, 
FileAccess.Read))
        {
            string credPath = System.Environment.GetFolderPath(
                System.Environment.SpecialFolder.Personal);
            credPath = Path.Combine(credPath, ".credentials/gmail-dotnet-
quickstart.json");

            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                Scopes,
                "user",
                CancellationToken.None,
                new FileDataStore(credPath, true)).Result;
            Console.WriteLine("Credential file saved to: " + credPath);
        }

        // Create Gmail API service.
        var service = new GmailService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = ApplicationName,
        });

        // Define parameters of request.
     //UsersResource.LabelsResource.ListRequest request = 
service.Users.Labels.List("me");

        List<Message> result = new List<Message>();
        UsersResource.MessagesResource.ListRequest request = 
service.Users.Messages.List("me");
        request.Q = "is:unread";

        do
        {
            try
            {
                ListMessagesResponse response = request.Execute();
                result.AddRange(response.Messages);
                request.PageToken = response.NextPageToken;
            }
            catch (Exception e)
            {
                Console.WriteLine("An error occurred: " + e.Message);
            }
        } while (!String.IsNullOrEmpty(request.PageToken));
        foreach (Message m in result)
        {
            Message m2 = service.Users.Messages.Get("me", m.Id).Execute();
            Console.WriteLine("Message: {0}", m2.Snippet);
        }

        WatchRequest body = new WatchRequest()
        {
            TopicName = "projects/test/topics/topicTest",
            LabelIds = new[] { "INBOX" }
        };
  string userId = "me";
        UsersResource.WatchRequest watchRequest = service.Users.Watch(body, 
userId);
        WatchResponse test = watchRequest.Execute();
        Console.Read();
    }
    }
}