public IEnumerable <FbContact> GetContacts()
        {
            Authenticate();

            string call_id = GetNextCallNr();

            Dictionary <string, string> requestParams = new Dictionary <string, string>();

            requestParams.Add("method", "friends.get");
            requestParams.Add("api_key", apiKey);
            requestParams.Add("session_key", sessionKey);
            requestParams.Add("call_id", call_id);
            requestParams.Add("v", "1.0");

            var result = channel.GetContacts(apiKey, sessionKey, call_id, GenerateSignature(requestParams, sessionSecret));

            XNamespace ns = result.GetDefaultNamespace();

            List <string> friendsList = result.Elements().Select(e => e.Value).ToList();

            for (int i = 0; i < friendsList.Count; i += 10)
            {
                // Creates lists like id1,id2,id3, etc
                var ids = String.Join(",", friendsList.Skip(i).Take(10).ToArray());

                // Now get the desired data for user's contact to define the attributes of ChannelContact object
                foreach (var info in GetUsersInfo(ids))
                {
                    yield return(info);
                }
            }
        }