public override bool UpgradesTo(Tile tile)
{
if ((Id != null && tile.Id != null) || !(tile is SimpleTile)) return base.UpgradesTo(tile);
SimpleTile other = (SimpleTile)tile;
return (this.exits.IsSubsetOf(other.exits)) && other.Phase == this.Phase + 1;
}
public virtual bool UpgradesTo(Tile tile)
{
throw new NotImplementedException();
}
public override bool UpgradesTo(Tile tile)
{
throw new NotImplementedException();
}