private void SendUpdateProfilePicNotification(NotificationModel notificationModel)
        {
            ulong tempNumber;

            if (NeeoUtility.IsNullOrEmpty(notificationModel.SenderID) ||
                !ulong.TryParse(notificationModel.SenderID, out tempNumber))
            {
                throw new ApplicationException(CustomHttpStatusCode.InvalidArguments.ToString("D"));
            }
            // Get the name of the user from data base.
            List <NeeoUser> userRoasterList = NeeoUser.GetUserRoster(notificationModel.SenderID);

            if (userRoasterList.Count == 0)
            {
                return;
            }

            notificationModel.Alert = "Update";

            var taskSendiOSNotification = Task.Factory.StartNew(() =>
            {
                var iosUserList =
                    userRoasterList.Where(
                        x =>
                        x.DevicePlatform == DevicePlatform.iOS && x.PresenceStatus == Presence.Offline).ToList();

                _services.ApnsService.Send(iosUserList, notificationModel);
            });

            var taskSendAndroidNotification = Task.Factory.StartNew(() =>
            {
                var androidUserList =
                    userRoasterList.Where(
                        x =>
                        x.DevicePlatform == DevicePlatform.Android
                        //&& x.PresenceStatus == Presence.Offline
                        ).ToList();

                _services.GcmService.Send(androidUserList, notificationModel);
            });

            Task.WaitAll(taskSendiOSNotification, taskSendAndroidNotification);
        }