public void SubmitButton_Handler(object sender, EventArgs e)
{
Person p = _personList.AddNew();
if ((p.FirstName == string.Empty) || (p.LastName == string.Empty))
{
MessageBox.Show("First Name and Last Name cannot be blank!");
_personList.CancelNew(_personList.IndexOf(p));
}
else
{
ClearEntryControls();
}
}