SpiralMatrix

using System;
using System.Collections.Generic;
using System.Linq;

namespace SpiralMatrix
{
    class Program
    {
        static void Main(string[] args)
        {
            int size = int.Parse(Console.ReadLine());
            int[,] matrix = new int[size, size];
            int index = 0;
            int x = 0;
            int square = (size * size);
            bool move = true;

            while (move)
            {
                ToRight(size, matrix, index, ref x, square, ref move);
                ToBottom(size, matrix, index, ref x, square, ref move);
                ToLeft(size, matrix, index, ref x, square, ref move);
                ToUp(size, matrix, index, ref x, square, ref move);
                index++;
            }

            Print(size, matrix);
        }

        private static void ToUp(int size, int[,] matrix, int idx, ref int x, int sq, ref bool move)
        {
            for (int col = idx; col < idx + 1; col++)
            {
                for (int row = size - 2 - idx; row > idx; row--)
                {
                    x++;
                    matrix[row, col] = x;
                    if (x == sq)
                    {
                        move = false;
                        break;
                    }
                }
            }
        }

        private static void ToLeft(int size, int[,] matrix, int idx, ref int x, int sq, ref bool move)
        {
            for (int row = size - 1 - idx; row > size - 2 - idx; row--)
            {
                for (int col = size - 2 - idx; col >= 0 + idx; col--)
                {
                    x++;
                    matrix[row, col] = x;
                    if (x == sq)
                    {
                        move = false;
                        break;
                    }
                }
            }
        }

        private static void ToBottom(int size, int[,] matrix, int idx, ref int x, int sq, ref bool move)
        {
            for (int col = size - 1 - idx; col > size - 2 - idx; col--)
            {
                for (int row = 1 + idx; row < size - idx; row++)
                {
                    x++;
                    matrix[row, col] = x;
                    if (x == sq)
                    {
                        move = false;
                        break;
                    }
                }
            }
        }

        private static void ToRight(int size, int[,] matrix, int idx, ref int x, int sq, ref bool move)
        {
            for (int row = idx; row < idx + 1; row++)
            {
                for (int col = idx; col < size - idx; col++)
                {
                    x++;
                    matrix[row, col] = x;
                    if (x == sq)
                    {
                        move = false;
                        break;
                    }
                }
            }
        }

        private static void Print(int size, int[,] matrix)
        {
            for (int row = 0; row < size; row++)
            {
                for (int col = 0; col < size; col++)
                {
                    Console.Write(matrix[row, col] + " ");
                }
                Console.WriteLine();
            }
        }
    }
}