private void btnDelete_Click(object sender, EventArgs e)
{
int deleteIndex;
//limit of -1 to prevent crashes when lstbox has no selected index
int limit = -1;
if (lstDisplayBox.SelectedIndex == limit)
{
MessageBox.Show("You have not selected any item to Delete");
}
else
{
//deleteIndex assigned the selected index
deleteIndex = lstDisplayBox.SelectedIndex;
//deleteInstance() method receives this index to delete this item from the teacher list as well as the list box
tea.DeleteInstance(deleteIndex);
//listbox removes the selected item
lstDisplayBox.Items.Remove(lstDisplayBox.SelectedItem);
}
}
