Checks the outcome of a tic tac toe game.

Tic Tac Toe checker

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Tic_Tac_Toe_Checker
{
    class Program
    {
        static void Main(string[] args) //testing method
        {
            int[,] board1 = { { 1, 2, 0 }, { 0, 2, 0 }, { 0, 1, 0 } };
            int[,] board2 = { { 1, 2, 0 }, { 0, 1, 2 }, { 0, 2, 1 } };
            int[,] board3 = { { 1, 2, 1 }, { 2, 2, 2 }, { 1, 1, 0 } };
            int[,] board4 = { { 1, 2, 1 }, { 1, 2, 1 }, { 2, 1, 2 } };
            Console.WriteLine(TTTcheck(board1)); //. should print "0"
            Console.WriteLine(TTTcheck(board2)); //. should print "1"
            Console.WriteLine(TTTcheck(board3)); //. should print "2"
            Console.WriteLine(TTTcheck(board4)); //. should print "-1"
        }

        static int TTTcheck(int[,] board)
        {
            int result = -1;
            if ((board[0, 0] == board[0, 1]) && (board[0, 0] == board[0, 2]))
            {
                if (board[0, 0] == 1) return 1;
                if (board[0, 0] == 2) return 2;
            }
            if ((board[1, 0] == board[1, 1]) && (board[1, 0] == board[1, 2]))
            {
                if (board[1, 0] == 1) return 1;
                if (board[1, 0] == 2) return 2;
            }
            if ((board[2, 0] == board[2, 1]) && (board[2, 0] == board[2, 2]))
            {
                if (board[2, 0] == 1) return 1;
                if (board[2, 0] == 2) return 2;
            }
            
            if ((board[0, 0] == board[1, 0]) && (board[0, 0] == board[2, 0]))
            {
                if (board[0, 0] == 1) return 1;
                if (board[0, 0] == 2) return 2;
            }
            if ((board[0, 1] == board[1, 1]) && (board[0, 1] == board[2, 1]))
            {
                if (board[0, 1] == 1) return 1;
                if (board[0, 1] == 2) return 2;
            }
            if ((board[0, 2] == board[1, 2]) && (board[0, 2] == board[2, 2]))
            {
                if (board[0, 2] == 1) return 1;
                if (board[0, 2] == 2) return 2;
            }
            
            if ((board[0, 0] == board[1, 1]) && (board[0, 0] == board[2, 2]))
            {
                if (board[0, 0] == 1) return 1;
                if (board[0, 0] == 2) return 2;
            }
            if ((board[0, 2] == board[1, 1]) && (board[0, 2] == board[2, 0]))
            {
                if (board[0, 2] == 1) return 1;
                if (board[0, 2] == 2) return 2;
            }

            for (int i = 0, x = 0; (i < 3) & (x < 3); i++)
            {
                if ((board[i, 0] == 0) || (board[i, 1] == 0) || (board[i, 2] == 0))
                    return 0;

            }

            return result;
        }
    }
}