using System;

public class Program

{

    public static void Main()

    {

            const int size =5;

            var matrix = RandomMatrix(size, size, 0, 9);

            PrintMatrix(matrix);

​

            Rotate(matrix, size);

            Console.WriteLine(" ");

            PrintMatrix(matrix);

    }

    private static void Rotate(int[][] matrix,int n){

        for(var layer=0;layer < n/2; ++layer){

            var first = layer;

            var last = n-1-layer;

            Console.WriteLine($"first: {first} last: {last}");

            for(var i=first; i < last; ++i){

                var offset =  i - first;

                var top= matrix[first][i];

                Console.WriteLine($"i:{i}   offset: {offset}");

                //left -> top

                matrix[first][i] = matrix[last - offset][first];

                //bottom -> left

                matrix[last-offset][first] = matrix[last][last - offset];

                //right -> bottom

                matrix[last][last-offset] = matrix[i][last];

                //top -> right

                matrix[i][last] = top;

                PrintMatrix(matrix);

            }

        }

    }

    //Helper methods

    private static readonly Random RandomIntNumbers = new Random();

    public static int RandomInt(int n)

        {

            return RandomIntNumbers.Next(n);

        }

​

        public static int RandomIntInRange(int min, int max)

        {

            return RandomInt(max + 1 - min) + min;

        }

    public static int[][] RandomMatrix(int m, int n, int min, int max)

        {

            int[][] matrix = new int[m][];

            for (int i = 0; i < m; i++)

            {

                matrix[i] = new int[n];

                for (int j = 0; j < n; j++)

                {

                    matrix[i][j] = RandomIntInRange(min, max);

                }

            }

            return matrix;

        }

    public static void PrintMatrix(int[][] matrix)

        {

            for (int i = 0; i < matrix.Length; i++)

            {

                for (int j = 0; j < matrix[i].Length; j++)

                {

                    if (matrix[i][j] < 10 && matrix[i][j] > -10)

                    {

                        Console.Write(" ");

                    }

                    if (matrix[i][j] < 100 && matrix[i][j] > -100)

                    {

                        Console.Write(" ");

                    }

                    if (matrix[i][j] >= 0)

                    {

                        Console.Write(" ");

                    }

                    Console.Write(" " + matrix[i][j]);

                }

                Console.WriteLine();

            }

        }

}