public void OnServiceConnected(ComponentName name, IBinder service)
        {
            StockServiceBinder stockServiceBinder = service as StockServiceBinder;

            if (stockServiceBinder != null)
            {
                StockServiceBinder binder = (StockServiceBinder)service;
                _mainActivity.Binder  = binder;
                _mainActivity.IsBound = true;
            }
        }