protected override void RefreshData()
{
ClientFactory clientFactory = new ClientFactory();
ClientGateway <Client> cg = (ClientGateway <Client>)clientFactory.GetClient();
Collection <ExtendedClient> clients = cg.SelectAll();
BindingList <ExtendedClient> bindingList = new BindingList <ExtendedClient>(clients);
clientsGrid.AutoGenerateColumns = false;
clientsGrid.DataSource = bindingList;
}