Snowflake

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

namespace Snowflake
{
    class Program
    {
        static void Main(string[] args)
        {
            int size = int.Parse(Console.ReadLine());

            int height = 2 * size + 1;
            int width = 2 * size + 3;
            char Dots = '.';
            char asterisks = '*';
            for (int row = 0; row <= height / 2 - 2; row++)
            {
                Console.WriteLine("{0}*{1}*{1}*{0}", new string(Dots, row), new string(Dots,size));
                size--;
            }
            for (int row = 0; row <= height / 2 - 2; row++)
            {
                size++;
            }
            Console.WriteLine("{0}{1}{0}", new string(Dots, size - 1), new string(asterisks, 5));
            Console.WriteLine(new string(asterisks,width));
            Console.WriteLine("{0}{1}{0}", new string(Dots, size - 1), new string(asterisks, 5));

            for (int row = 0; row <= height / 2 - 2; row++)
            {
                Console.WriteLine("{0}*{1}*{1}*{0}", new string(Dots, size - 2), new string(Dots, row + 2));
                size--;
            }
        }
    }
}