AIsOfCatan.Board.GetPlayersLongestRoad C# (CSharp) Method

        public int GetPlayersLongestRoad(int playerID)
        {
            int highest = 0;
            // floodfill from each road segment to see if it constitutes the longest road.
            HashSet<Edge> visited = new HashSet<Edge>();
            foreach (var road in roads.Where(r => GetRoad(r.Key) == playerID))
            {
                if (visited.Contains(road.Key)) continue; // already explored
                visited.Add(road.Key);

                // get ends
                Intersection[] ends = this.GetAdjacentIntersections(road.Key);
                HashSet<Edge> tempVisited = new HashSet<Edge>();
                tempVisited.Add(road.Key);
                int first = CountRoadLengthFromIntersection(road.Value, ends[0], tempVisited, visited);
                int second = CountRoadLengthFromIntersection(road.Value, ends[1], tempVisited, visited);

                int result = first + 1 + second;
                if (highest < result)
                {
                    highest = result;
                }
            }
            return highest;
        }