private void UpdateResponcesList()
        {
            var logStr = _itemsChangingHttpResponceDataSource.RandomUpdateHttpResponce();

            Application.Current.Dispatcher.Invoke(() => ChangingListLog.Insert(0, logStr));
        }
 private void StopUpadatingResponcesList()
 {
     ChangingListLog.Insert(0, "STOP");
     _updateResponcesList.Change(Timeout.Infinite,
                                 Timeout.Infinite);
 }
 private void ClearResponcesList()
 {
     ChangingListLog.Insert(0, "CLEAR LIST");
     _itemsChangingHttpResponceDataSource.ClearList();
 }
 private void StartUpadatingResponcesList()
 {
     ChangingListLog.Insert(0, "START");
     _updateResponcesList.Change(TimeSpan.Zero,
                                 _updatingResponceTimeInterval);
 }