如何在Windows Form应用程序C#中检索谷歌联系人？

using Google.Apis.Auth.OAuth2;
using Google.Apis.People.v1;
using Google.Apis.People.v1.Data;
using Google.Apis.Services;

// ...

UserCredential credential;
using (var stream = new FileStream("path_to_your_client_secret.json", FileMode.Open, FileAccess.Read))
{
    credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
        GoogleClientSecrets.Load(stream).Secrets,
        new[] { PeopleService.Scope.ContactsReadonly },
        "user",
        CancellationToken.None).Result;
}

// 创建一个PeopleService客户端
var service = new PeopleService(new BaseClientService.Initializer()
{
    HttpClientInitializer = credential,
    ApplicationName = "YourAppName"
});

// 检索联系人
var connections = service.People.Connections.List("people/me");
connections.RequestMaskIncludeField = "person.names,person.emailAddresses";
var response = connections.Execute();

// 处理响应数据
foreach (var person in response.Connections)
{
    Console.WriteLine("Name: " + person.Names[0].DisplayName);
    Console.WriteLine("Email: " + person.EmailAddresses[0].Value);
}