private void deleteButton_Click(object sender, EventArgs e) { if (String.IsNullOrEmpty(idTextBox.Text)) { MessageBox.Show("Id cant be Empty"); return; } string id = (idTextBox.Text); if (_mangerItem.DeleteData((id))) { MessageBox.Show("Deleted"); displayDataGridView.DataSource = _mangerItem.ShowAllInformation(); } else { MessageBox.Show("Not Deleted"); } }