int[,] arr = new int[12, 12];
            Stack<int> res = new Stack<int>();

            arr = Arr;
            list.Clear();
            stack.Clear();
            int v = 0;
            int u;
            int flag = 1;
            if (index != -1)
                v = index;
            stack.Push(v);
            while(stack.Count > 0)
            {
                v = stack.Peek();
                for(int i = 0; i <Points.Count; i++)
                {
                    if (arr[v, i] == 1)
                    {
                        u = i;
                        stack.Push(u);
                        arr[i, v] = arr[v, i] = 0;
                        flag = 1;
                        break;
                    }
                    if (flag == 1) break;
                }
                if(flag == 0)
                  res.Push(stack.Pop());
                flag = 0;
            }