Star-drawing-string

using System;

    class Pairs
    {
        static void Main()
        {
            int n = int.Parse(Console.ReadLine());

            Console.WriteLine("{0}*{0}", new string ('.',(n)));

            for (int i = 1; i < n/2; i++)
            {
                Console.WriteLine("{0}*{1}*{0}", new string ('.', n-i), new string ('.', i*2-1));
            }

            Console.WriteLine("{0}{1}{0}", new string('*', (n+2)/2), new string ('.', n-1),new string('*', (n+2)/2)) ;

            for (int i = 1; i < n/2; i++)
            {
                Console.WriteLine("{0}*{1}*{0}", new string ('.', i), new string('.', 2*n-1-(i*2) ));
            }

            Console.WriteLine("{0}*{1}*{1}*{0}", new string ('.', n/2), new string ('.', n/2-1) );

            for (int i = 0; i < n/2 - 1; i++)
            {
                Console.WriteLine("{0}*{1}*{2}*{1}*{0}", new string ('.',n/2-i-1), new string ('.', n/2-1), new string ('.', (i+1)*2-1));
            }
            Console.WriteLine("{0}{1}{0}", new string('*', (n + 2) / 2), new string('.', n - 1), new string('*', (n + 2) / 2));
        }
    }