protected void tvwAddress_SelectedNodeChanged(object sender, EventArgs e)
{
if (tvwAddress.SelectedNode.ChildNodes.Count == 0)
{
AddressDetails details = new AddressDetails();
string City = tvwAddress.SelectedNode.Text;
string AddressDetails = details.getAddress(City);
lblAddress.Text = AddressDetails;
}
else
{
tvwAddress.SelectedNode.Expand();
lblAddress.Text = "";
}
}