Matrix Rotation

using System;

class Week2MatrixRotation
{
    static void Main()
    {
        int n = 3;
        int[,] matrix = new int[n, n];
        /* The counter will be filling the matrices, as the numbers in them are to be consecutive */
        int counter;

        // filling the matrix
        counter = 1;
        for (int row = 0; row < n; row++)
        {
            for (int col = 0; col < n; col++)
            {
                matrix[col, row] = counter;
                counter++;
            }
        }

        // 1st print
        for (int rows = 0; rows < n; rows++)
        {
            for (int cols = 0; cols < n; cols++)
            {
                // changed places of rows and columns, so that we can get the columns printed one by one
                Console.Write("{0,3}", matrix[cols, rows]);
            }
            Console.WriteLine();
        }
        Console.WriteLine();

        // 2rd print: 1st 90% rotation
        for (int rows = 0; rows < n; rows++)
        {
            for (int cols = n - 1; cols >= 0; cols--)
            {
                Console.Write("{0,3}", matrix[rows, cols]);
            }
            Console.WriteLine();
        }
        Console.WriteLine();

        // 3rd print: 2nd 90% rotation
        for (int rows = n - 1; rows >= 0; rows--)
        {
            for (int cols = n - 1; cols >= 0; cols--)
            {
                Console.Write("{0,3}", matrix[cols, rows]);
            }
            Console.WriteLine();
        }
        Console.WriteLine();

        // 4th print: 3rd 90% rotation
        for (int rows = n - 1; rows >= 0; rows--)
        {
            for (int cols = 0; cols < n; cols++)
            {
                Console.Write("{0,3}", matrix[rows, cols]);
            }
            Console.WriteLine();
        }
        Console.WriteLine();
    }
}