foreach where example

  public static DIRECTIONS[] IntersectDirections(Hexagon[] hexagons)
    {
        List<DIRECTIONS> tempList = new List<DIRECTIONS>();
        foreach (var h in hexagons)
        {
            foreach (var direction in h.Connections.Where(direction => !tempList.Contains(direction)))
            {
                tempList.Add(direction);
            }
        }

        return tempList.ToArray();
    }