private void toolStripMenuItem12_Click(object sender, EventArgs e)
        {
            var            editTool = dataGridViewAuction.SelectedRows[0].DataBoundItem as Auction;
            AddAuctionForm aduf     = new AddAuctionForm(editTool);

            if (aduf.ShowDialog() == DialogResult.OK)
            {
                auctionBindingSource.ResetBindings(false);
                art.isChangeData = true;
            }
        }
        private void toolStripMenuItem4_Click(object sender, EventArgs e)
        {
            AddAuctionForm aduf = new AddAuctionForm();

            if (aduf.ShowDialog() == DialogResult.OK)
            {
                art.AddAuction(aduf.auction);
                auctionBindingSource.ResetBindings(false);
                art.isChangeData = true;
                var lastIdx = dataGridViewAuction.Rows.Count - 1;
                dataGridViewAuction.Rows[lastIdx].Selected          = true;
                dataGridViewAuction.FirstDisplayedScrollingRowIndex = lastIdx;
            }
        }