internal override async Task AddRecord()
        {
            try
            {
                _model   = new EditingModelForm();
                _present = new ModelPresenter(_model);
                _model.ShowDialog();

                await Update();
            }
            catch (Exception ex)
            {
                ShowError(ex.Message);
            }
        }
        internal override async Task EditRecord()
        {
            try
            {
                if (ExistsRecord)
                {
                    _model   = new EditingModelForm();
                    _present = new ModelPresenter(_model, Item.ID);
                    _model.ShowDialog();

                    await Update();
                }
            }
            catch (Exception ex)
            {
                ShowError(ex.Message);
            }
        }