draw diamond shape giving it;s height as input using console application

[KINGMAKER'S]

using System;
using System.Collections.Generic;
using System.Text;

namespace diamond
{
    class Program
    {
        static void Main(string[] args)
        {

            Program p = new Program();
            p.acc();
        }
       
            public void acc()
            {
                Console.Write("Enter the number: ");
                int n = int.Parse(Console.ReadLine());
                for (int i = 0; i <= n; i++)
                {
                    Console.ForegroundColor = ConsoleColor.Gray;
                    for (int a = n - 1; a >= i; a--)
                    {
                        Console.Write(" ");
                    }
                    for (int j = 0; j <= i; j++)
                    {
                        Console.Write("*");
                    }
                    for (int y = 1; y <= i; y++)
                    {
                        Console.Write("*");
                    }
                    Console.WriteLine();
                    
                }
                for (int i = 1; i <= n; i++)
                {
                    for (int j = 1; j <= i; j++)
                    {
                        Console.Write(" ");
                    }
                    for (int k = n; k >= i; k--)
                    {
                        Console.Write("*");
                    }
                    for (int k = n - 1; k >= i; k--)
                    {
                        Console.Write("*");
                    }
                    Console.WriteLine(" ");
                    Console.ForegroundColor = ConsoleColor.Blue;
                    
                }
                Console.ReadKey();
            }
        }
    }