Multiplication Tables

Print out the grade school multiplication table upto 12*12.

None
Print out the table in a matrix like fashion, each number formatted to a width of 4 (The numbers are right-aligned and strip out leadeing/trailing spaces on each line). The first 3 line will look like: 
e.g.

1   2   3   4   5   6   7   8   9  10  11  12
2   4   6   8  10  12  14  16  18  20  22  24
3   6   9  12  15  18  21  24  27  30  33  36

i am trying it but its not working

int i,j,sum=0;            
            for (i = 1; i <= 10; i++)
            {
                for (j = 1; j <= 12; j++)
                {
                    sum = i * j;                    
                    Console.Write(sum+"\t");
                }
                Console.WriteLine();
            }
            Console.ReadLine();