Communication

using System;
using Unit4.CollectionsLib;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        public static void PrintPath(int[] path)
        {
            int i = 0;
            while (path[i] > 0)
            {
                Console.Write(path[i] + " ");
                i++;
            }
        }
        public static int[] BuildPath(int[,] arr, int firstSelection, int station, int call)
        {
            int nextStation = 0;
            int countPath = 0;
            int[] path = new int[arr.GetLength(0)];
            for (int i = 0; i < path.Length; i++)
                path[i] = -1;
            path[0] = station + 1;
            path[1] = arr[station, firstSelection];
            countPath = 2;
            while (countPath < path.Length && path[countPath - 1] != call + 1)
            {
                nextStation = arr[path[countPath - 1] - 1, 0];
                if (nextStation == path[countPath - 2])
                    nextStation = arr[path[countPath - 1] - 1, 1];
                path[countPath] = nextStation;
                countPath++;
            }
            return path;
        }
        public static void IndirectCommunication(int[,] arr, int station, int call)
        {
            int[] pathOne, pathTwo;
            pathOne = BuildPath(arr, 0, station, call);
            pathTwo = BuildPath(arr, 1, station, call);
            Console.WriteLine("\nPath one");
            PrintPath(pathOne);
            Console.WriteLine("\nPath two");
            PrintPath(pathTwo);
            Console.WriteLine();
        }
        public static bool DirectCommunication(int[,] arr, int station, int call)
        {
            return call - 1 == arr[station, 0] || call - 1 == arr[station, 1];
        }
        public static void Main(string[] args)
        {
            int[,] channels = new int[16, 2] {{5, 9}, {7, 10}, {6, 11}, {13, 16}, {1, 16}, {3, 11},
                                              {2, 15}, {12, 14}, {1, 14}, {2, 15}, {3, 6}, {8, 13},
                                              {4, 12}, {8, 9}, {7, 10}, {4, 5} };
            for (int i = 0; i < channels.GetLength(0); i++)
            {
                Console.Write("Station number " + (i + 1) +" - ");
                Console.Write(channels[i, 0] + " , " + channels[i, 1]);
                Console.WriteLine();
            }
            IndirectCommunication(channels, 4, 12);
        }
    }
}