private static void constructTree(CastleUpgrader set)
{
if (set == null)
{
return;
}
castles.Add(set1);
if (set.left != null)
{
constructTree(set.left);
}
if (set.right != null)
{
constructTree(set.right);
}
}
protected override void upgrade(CastleUpgrader g)
{
base.upgrade(g);
determineChoices();
}