internal class Program
{
    static void Main(string[] args)
    {
        int line = 1;
        int column = 0;
        int sum = 0;
        int productOfNumbers = 1;

        int[,] arrya = {
            { 1, 2, 3 },
            { 4, 5, 6 },
            { 7, 8, 9 }
        };

        for (int i = 0; i < arrya.GetLength(1); i++)
        {
            sum += arrya[line, i];
        }

        for (int i = 0;i < arrya.GetLength(0); i++)
        {
            productOfNumbers *= arrya[i, column];
        }

        for(int i = 0; i < arrya.GetLength(0) ; i++)
        {
            for (int j = 0; j < arrya.GetLength(1); j++)
            {
                Console.Write(arrya[i, j] + " ");
            }
            Console.WriteLine();
        }

        Console.WriteLine($"сумма второй строки - {sum},\nпроизведение первого столбца - {productOfNumbers}.");
    }
}