private void DisplayLevel1List()
{
if (string.IsNullOrEmpty(Level1Original()))
{
cboLevel1Manual.DataSource = null;
}
else
{
var list = geoCoder.Level1GazetteerNames();
// format - add a leave blank option to the bottom of the list
list.Add(LeaveBlankText);
cboLevel1Manual.DataSource = list;
}
}