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//First, a small class to hold the data



/// <summary>

/// class to hold the data from our Google contacts

/// </summary>

public class GoogleContacts

{

    public string title { get; set; }

    public string email { get; set; }

    public string im { get; set; }

}



//Next method for retrieving the contacts



/// <summary>

/// method for retrieving all contacts in a persons Google Mail address book

/// </summary>

/// <param name="appName">the application making the request</param>

/// <param name="un">username of the account</param>

/// <param name="pwd">password of the account</param>

/// <returns></returns>

public static List<GoogleContacts> GetGoogleContacts(string appName, string un, string pwd)

{

    //list to hold all contacts returned

    List<GoogleContacts> contactList = new List<GoogleContacts>();



    //create an instance of the request settings

    RequestSettings settings = new RequestSettings(appName, un, pwd);

    //set AutoPaging to true so we get all the contacts

    settings.AutoPaging = true;

    

    //now send ouor request for contacts

    ContactsRequest request = new ContactsRequest(settings);



    //retrieve the contacts returned

    Feed<Contact> feed = request.GetContacts();



    //here we will loop through all the contacts returned and add them to our list

    foreach (Contact contact in feed.Entries)

    {

        GoogleContacts c = new GoogleContacts();

        c.title = string.IsNullOrEmpty(contact.Title) ? "Name Not Present" : contact.Title;

        c.email = contact.Emails[0].Address;

        c.im = contact.IMs.Count == 0 ? "IM Address Not Present" : contact.IMs[0].Address;



        contactList.Add(c);

    }

    return contactList;

}



//Sample usage

static void Main(string[] args)

{

    List<GoogleContacts> list = GetGoogleContacts("GoogleTest", "YourGmailAddress", "YourGmailPassword");



    Console.WriteLine("Total Contacts Retrieved: " + list.Count());

    Console.WriteLine("************************************************");

    Console.WriteLine();



    foreach (GoogleContacts contact in list)

    {                

        Console.WriteLine(contact.title);

        Console.WriteLine(contact.email);

        Console.WriteLine(contact.im);

        Console.WriteLine();

    }

    Console.ReadLine();

}