Spiral

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication102
{
    class Program
    {
        static void Main(string[] args)
        {
            int row = 50;
            int col = 50;
            int[,] arr = new int[row, col];

            int x = row / 2, y = col / 2;
            int count = 1;
            int count2 = 1;
            bool up = true;
            bool down = false;
            bool control = true;
            int step = 4;
            int step2 = 3;
            arr[x, y] = 1;  // centr
            arr[x += step2, y += step2] = ++count;
            arr[x += step2, y -= step2] = ++count;
            //arr[x, y -= 2] = ++count;

            for(int j = 0 ; j <5; j++ )
            {
                if(up)
                    arr[x, y -= step] = ++count;
                for(int i = 0; i < count2 && x > 0 && x <= row ;i++)
                {
                    if (up)
                    {
                        if (control)
                        {
                            arr[x -= step2, y -= step2] = ++count;
                            if (i + 1 == count2)
                            {
                                arr[x -= step2, y] = ++count;
                                control = false;
                                i = -1;
                                continue;
                            }
                        }
                        if (control == false)
                        {
                            arr[x -= step2, y += step2] = ++count;
                            
                            if(i+1 == count2)
                            {
                                up = false;
                                down = true;
                                count2++;
                                break;
                            }
                          //  arr[x -= 2, y += 2] = ++count;
                        }
                    }
                    if(down)
                    {
                        if (!control)
                        {
                            arr[x += step2, y += step2] = ++count; 
                            if(i+1 == count2)
                            {
                              //  arr[x += step2, y] = ++count;
                                control = true;
                                i = -1;
                                continue;
                            }
                        }
                        if(control)
                        {
                            arr[x += step2, y -= step2] = ++count;
                            if(i+1 == count2)
                            {
                                down = false;
                                up = true;
                                break;
                            }
                           // arr[x += step2, y -= step2] = ++count;
                        }
                       
                    }

                }
                if(down)
                    arr[x, y+= step] = ++count;
                step++;
            }

            
            for(int i =0; i <row;i++)
            {
                for(int j =0;j<col;j++)
                {
                   
                    if (arr[i, j] == 0)
                    {
                        char a = ' ';
                        Console.Write(a);
                    }
                    else
                    {   
                        if(arr[i,j].ToString().Length == 1)
                            Console.Write(arr[i, j] + " ");
                        else
                            Console.Write(arr[i, j]);
                    }
                }
                Console.WriteLine();
            }

        }
    }
}