Romb of stars

using System;

namespace Test2
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            int n = int.Parse (Console.ReadLine ());
            for (int row = 0; row <n; row++) {


                for (int col = 0; col < n-row-1; col++) {
                    Console.Write(" ");
                }
                for (int j = 0; j < row+1; j++) {
                    Console.Write ("* ");
                }
             Console.WriteLine ();
            }
            for (int row = 1; row < n; row++) {
                for (int i = 0; i < row; i++) {
                    Console.Write (" ");

                }
                for (int j = 0; j < n-row; j++) {
                    Console.Write ("* ");
                }
                Console.WriteLine ();
            }

        }
    }
}