private void ItemsBox_CheckedChanged(object sender, EventArgs e) { addItemButton.Show(); dataGridView2.BringToFront(); ItemPanel.BringToFront(); dataGridView1.Rows.Clear(); dataGridView2.Rows.Clear(); foreach (var item in _shipper.ShowItems()) { dataGridView2.Rows.Add(item.ItemID, item.Name, item.Price, item.OnStock); } if (textBox1.Text.Length != 0) { updateItemButton_Click_1(sender, e); textBox1.Clear(); textBox2.Clear(); textBox3.Clear(); textBox4.Clear(); textBox5.Clear(); } }