Tabliczka mnozenia C#

int a, b, i, j, k;
Console.WriteLine("Podaj rozmiar tabliczki mnozenia: ");
a = int.Parse(Console.ReadLine());
for (j = 1; j {
if (j == 1)
{
Console.Write("");
Console.Write("\t{0}", j);
}
else
{
Console.Write("\t{0}", j);

}
}
for (i = 1; i {
Console.Write("\n {0}", i);
for (k = 1; k {
b = i * k;
Console.Write("\t{0}", b);
}

}
Console.ReadKey();

C# windows xp