private void btnAdd_Click(object sender, EventArgs e)
        {
            frmCntrlCustomerEdit objFrmCustomerEdit = new frmCntrlCustomerEdit();

            objFrmCustomerEdit.ShowDialog();


            var list = new BindingList <CustomerE>(objCustomerB.Customers);

            dataGridView1.DataSource = list;
            dataGridView1.Refresh();
        }
        private void btnEdit_Click(object sender, EventArgs e)
        {
            string selectedCustomerName =
                dataGridView1.CurrentRow.Cells["CustomerName"].Value.ToString();

            frmCntrlCustomerEdit objFrmCustomerEdit = new frmCntrlCustomerEdit(selectedCustomerName);

            objFrmCustomerEdit.ShowDialog();

            var list = new BindingList <CustomerE>(objCustomerB.Customers);

            dataGridView1.DataSource = list;
            dataGridView1.Refresh();
        }