Google 通讯录 API 会返回我发送到的电子邮件地址列表，但不会返回联系人列表中的电子邮件地址

Google 通讯录 API 会返回我发送到的电子邮件地址列表，但不会返回联系人列表中的电子邮件地址？

我正在使用谷歌联系人 api，并尝试在我的 Gmail 联系人中获取电子邮件列表。谷歌联系人在 https://contacts.google.com/u/0/preview/all .

下面是我使用的代码：

public List<GMail> GetContacts(GooglePlusAccessToken serStatus)
{
    List<GMail> ret = new List<GMail>();
    string google_client_id = _ClientId;
    string google_client_sceret = _ClientSeceret;
    string refreshToken = serStatus.refresh_token;
    string accessToken = serStatus.access_token;
    string scopes = "https://www.google.com/m8/feeds/contacts/default/full/";
    OAuth2Parameters oAuthparameters = new OAuth2Parameters()
    {
        ClientId = google_client_id,
        ClientSecret = google_client_sceret,
        RedirectUri = GetRedirectUrl(), 
        Scope = scopes,
        AccessToken = accessToken,
        RefreshToken = refreshToken
    };
    RequestSettings settings = new RequestSettings("<var>Invite GMail Friends</var>", oAuthparameters);
    ContactsRequest cr = new ContactsRequest(settings);
    ContactsQuery query = new ContactsQuery(ContactsQuery.CreateContactsUri("default"));
    query.NumberToRetrieve = _NumberToRetrieve;
    Feed<Contact> feed = cr.Get<Contact>(query);
    foreach (Contact entry in feed.Entries)
    {
        foreach (EMail email in entry.Emails)
        {
            GMail g = new GMail(email.Address);
            ret.Add(g);
        }
    }
    return ret;
}

但由于某些原因，代码返回我过去发送到的电子邮件地址列表，但不返回联系人列表中的电子邮件。这是对的吗？有人知道为什么吗？

谢谢

** 感谢艾伦的回答，这是我的代码，效果很好！联系人组实际上是：SystemGroup:MyContacts@gmail.com**

public List<GMail> GetContacts_2(GooglePlusAccessToken serStatus)
{
    List<GMail> ret = new List<GMail>();
    string google_client_id = _ClientId;
    string google_client_sceret = _ClientSeceret;
    /*Get Google Contacts From Access Token and Refresh Token*/
    string refreshToken = serStatus.refresh_token;
    string accessToken = serStatus.access_token;
    string scopes = "https://www.google.com/m8/feeds/groups/default/full/?v=3.0";
    OAuth2Parameters oAuthparameters = new OAuth2Parameters()
    {
        ClientId = google_client_id,
        ClientSecret = google_client_sceret,
        RedirectUri = GetRedirectUrl(), 
        Scope = scopes,
        AccessToken = accessToken,
        RefreshToken = refreshToken
    };

    RequestSettings settings = new RequestSettings("<var>Invite GMail Friends</var>", oAuthparameters);
    ContactsRequest cr = new ContactsRequest(settings);
    GroupsQuery query = new GroupsQuery(GroupsQuery.CreateGroupsUri("default"));
    query.NumberToRetrieve = 1000;  // _NumberToRetrieve; // 100;// 5000;
    //Feed feed = cr.Get(query);
    Feed<Group> feed = cr.Get<Group>(query);
    string gpId = string.Empty;
    foreach (Group gp in feed.Entries)
    {
        if (gp.Title.Contains("Contacts"))
        {
            gpId = gp.Id;
            //break;
        }
        //// for testing
        //GMail g = new GMail(gp.Title.Replace(" ", "") + "@gmail.com");
        //ret.Add(g);
    }
    if (gpId.Length > 0)
    {
        scopes = "https://www.google.com/m8/feeds/contacts/default/full/?v=3.0";
        oAuthparameters = new OAuth2Parameters()
        {
            ClientId = google_client_id,
            ClientSecret = google_client_sceret,
            RedirectUri = GetRedirectUrl(),
            Scope = scopes,
            AccessToken = accessToken,
            RefreshToken = refreshToken
        };
        settings = new RequestSettings("<var>Invite GMail Friends</var>", oAuthparameters);
        //ContactsRequest cr = new ContactsRequest(settings);
        cr = new ContactsRequest(settings);
        ContactsQuery query2 = new ContactsQuery(ContactsQuery.CreateContactsUri("default"));
        query2.NumberToRetrieve = _NumberToRetrieve; // 100;// 5000;
        query2.OrderBy = ContactsQuery.OrderByLastModified;
        query2.SortOrder = ContactsQuery.SortOrderDescending;
        query2.Group = gpId;
        Feed<Contact> feed2 = cr.Get<Contact>(query2);
        foreach (Contact entry in feed2.Entries)
        {
            foreach (EMail email in entry.Emails)
            {
                GMail g = new GMail(email.Address);
                ret.Add(g);
            }
        }
        //if (ret.Count <= 0)
        //{
        //    GMail g = new GMail("NoContact@gmail.com");
        //    ret.Add(g);
        //}
    }
    //else
    //{
    //    // for testing
    //    GMail g = new GMail("NoGroup@gmail.com");
    //    ret.Add(g);
    //}
    return ret;
}

Dim settings As New RequestSettings("MyApp", RefreshOAuthToken())
Dim cr As New ContactsRequest(settings)
    'retrieve Contacts group (this is to retrieve only real contacts)
Dim groupquery As New GroupsQuery(GroupsQuery.CreateGroupsUri("default"))
Dim fgrp As Feed(Of Group) = cr.Get(Of Group)(groupquery)
Dim GroupAtomId As String = ""
For Each gr In fgrp.Entries
    If gr.Title.Contains("Contacts") Then
       GroupAtomId = gr.Id
             Exit For
    End If
Next

Dim query As New ContactsQuery(ContactsQuery.CreateContactsUri("default"))
query.NumberToRetrieve = 2000
query.OrderBy = ContactsQuery.OrderByLastModified
query.SortOrder = ContactsQuery.SortOrderDescending
query.Group = GroupAtomId
Dim f As Feed(Of Contact) = cr.Get(Of Contact)(query)
For Each entry As Contact In f.Entries
 'Do something with the data, these are real contacts in GMail
Next