void StationListItemEndEdit(IEditableObject sender)
        {
            StationUIObject iTabObject = sender as StationUIObject;

            try
            {
                //if (iTabObject.TankId == 0)
                //{
                //    iTabObject.TankId = currTankId;
                //}
                // use the data access layer to update the wrapped data object
                dataAccessLayer.UpdateStation(iTabObject.GetDataObject());
                iTabObject.NotifyIdChange();
            }
            catch (Exception ex)
            {
                if (PersistenceError != null)
                {
                    PersistenceError(this, ex);
                }
            }
        }
        void StationListCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.Action == NotifyCollectionChangedAction.Remove)
            {
                try
                {
                    foreach (object item in e.OldItems)
                    {
                        StationUIObject iTabObject = item as StationUIObject;

                        // use the data access layer to delete the wrapped data object
                        dataAccessLayer.DeleteStation(iTabObject.GetDataObject());
                    }
                }
                catch (Exception ex)
                {
                    if (PersistenceError != null)
                    {
                        PersistenceError(this, ex);
                    }
                }
            }
        }