public static async Task <IList <MyObject> > GetBriefingsByDateAndCenter(DateTime start, DateTime end, string brfCenter) { try { string briefing = string.Format(Constants.BRIFINGS_BY_CENTER_DATE, start.ToString("s", System.Globalization.CultureInfo.InvariantCulture), end.ToString("s", System.Globalization.CultureInfo.InvariantCulture), brfCenter); string str = await ServiceInvoker.GetResponseFromServiceAsync(briefing); var serializer = new DataContractJsonSerializer(typeof(IList <MyObject>)); var ms = new MemoryStream(Encoding.UTF8.GetBytes(str)); var data = (IList <MyObject>)serializer.ReadObject(ms); if (data != null) { foreach (var item in data) { // App.GuestFromService.Add(item.BriefingTitle); } } //log("GetBriefingDetails: " + str + "\r\n"); return(data); } catch (Exception ex) { //log(ex + "\r\n"); throw ex; } }