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}.");
}
}