private void DownloadFeedsJsonCompletedCallback(Object sender, DownloadStringCompletedEventArgs e)
        {
            if (e.Error != null) return;
            if (string.IsNullOrEmpty(e.Result)) return;

            //if (e.UserState == null) return;
            try
            {
                var root = JsonConvert.DeserializeObject<DataModel.GoogleFeeds>(e.Result);

                List<DataModel.GoogleFeedsResponseDataEntry> googleFeedsResponseDataEntryList = root.ResponseData.ResponseData;
                if (googleFeedsResponseDataEntryList != null)
                {
                    _feedItemlist = new List<DataModel.ChannelItem>();
                    _feedItemCheckTime = 0;
                    _googleFeedsResponseDataEntryListSize = googleFeedsResponseDataEntryList.Count;

                    foreach (var entry in googleFeedsResponseDataEntryList)
                    {
                        var userToken = e.UserState as DataModel.UserToken;
                        var newUserToken = new DataModel.UserToken
                        {
                            Callback = userToken.Callback,
                            DataFetchType = userToken.DataFetchType,
                            ChannelId = entry.Link,
                            FeedUrl = entry.Url
                        };

                        //Debug.WriteLine(entry1.Url);
                        if (entry.Url != null && !"".Equals(entry.Url))
                        {
                            FetchFeedItem(entry.Url, newUserToken);
                        }
                    }
                }
                else
                {
                    _feedItemlist = new List<DataModel.ChannelItem>();
                    _googleFeedsResponseDataEntryListSize = 0;
                    //ToDo: list is empty
                }

            }
            catch (Exception ex)
            {
            }
        }
        private void DownloadFeedsJsonCompletedCallback(Object sender, DownloadStringCompletedEventArgs e)
        {
            if (e.Error != null) return;
            if (string.IsNullOrEmpty(e.Result)) return;

            //if (e.UserState == null) return;

            var root = JsonConvert.DeserializeObject<DataModel.GoogleFeeds>(e.Result);

            List<DataModel.GoogleFeedsResponseDataEntry> googleFeedsResponseDataEntryList = root.ResponseData.ResponseData;
            if (googleFeedsResponseDataEntryList != null)
            {
                _feedItemlist = new List<DataModel.ChannelItem>();
                _googleFeedsResponseDataEntryListSize = googleFeedsResponseDataEntryList.Count;

                foreach (var entry in googleFeedsResponseDataEntryList)
                {

                    //var channelId = Guid.NewGuid().ToString();
                    var channelId = HttpUtility.UrlEncode(entry.Link);

                    var userToken = e.UserState as DataModel.UserToken;
                    var newUserToken = new DataModel.UserToken
                        {
                            Callback = userToken.Callback,
                            DataFetchType = userToken.DataFetchType,
                            ChannelId = channelId
                        };

                    FetchFeedItem(entry.Url, newUserToken);

                }
            }
            else
            {
                _feedItemlist = new List<DataModel.ChannelItem>();
                _googleFeedsResponseDataEntryListSize = 0;
                //ToDo: list is empty
            }
        }