graph.AddConnection();

ArrayList stationFirst = new ArrayList();
        ArrayList stationDest = new ArrayList();
        ArrayList distanceList = new ArrayList();

foreach(string item in stationFirst)
        {

            foreach(string item1 in stationDest)
            {
                foreach(int item2 in distanceList)
                {
                    //   MessageBox.Show(item + " " + item1 + " " + item2);
                    graph.AddConnection(item, item1, item2, true);
                }

            }
        }

var newList = new ArrayList();
        for (int i = 0; i < stationFirst.Count; i++)
        {
            newList.Add(stationFirst[i]);
            newList.Add(stationDest[i]);
            newList.Add(distanceList[i]);
        }