Not getting desired mirror image in diamond pattern?

See more:

C#

I am making a program to display diamond pattern. Number of rows of diamond would be equal to the input value entered by user. That is what i have done. But lower part of diamond is not printing mirror image of upper part?
Here is my program:

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

namespace diamonddemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Program for displaying pattern of *.");
            Console.Write("Enter the maximum number of *: ");
            int n = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("\nHere is the Diamond of Stars\n");
                for (int i = 0; i < n; i= i+2) {
                for (int j = 0; j<=i; j++)
                Console.Write("*");         
                Console.WriteLine();
               }
               for (int i = n-1; i>=1; i=i-2)
               {
                   for (int j = 0; j<(n-i); j++)
                       Console.Write("*");
                   Console.WriteLine();
               }
          Console.ReadLine();
      }
    }
}