Christmas Tree

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

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Write x: ");
            int i;
            int j;
            int k;
            int x = Convert.ToInt32(Console.ReadLine());

            i = 0;
            while(i < x)
            {
                k = 0;
                while(k < x - 1 - i)
                {
                    Console.Write("  ");
                    k++;
                }

                j = 0;
                while(j <=  2 * i)
                {
                    Console.Write("* ");
                    j++;
                }

                Console.WriteLine();
                i++;
            }

            i = 0;
            while (i < x)
            {
                k = 0;
                while (k < x - 1 - i)
                {
                    Console.Write("  ");
                    k++;
                }

                j = 0;
                while (j <= 2 * i)
                {
                    Console.Write("* ");
                    j++;
                }

                Console.WriteLine();
                i++;
            }

            i = 0;
            while (i < x)
            {
                k = 0;
                while (k < x - 1 - i)
                {
                    Console.Write("  ");
                    k++;
                }

                j = 0;
                while (j <= 2 * i)
                {
                    Console.Write("* ");
                    j++;
                }

                Console.WriteLine();
                i++;
            }
            i = 0;
            while (i < x)
            {
                k = 0;
                while(k < x - 2)
                {
                    Console.Write("  ");
                    k++;
                }
                j = 0;
                while (j < x - 2)
                {
                    Console.Write("* ");
                    j++;
                }

                Console.WriteLine();
                i++;
            }

            Console.WriteLine("Press SPACE to EXIT");
            Console.ReadKey();

        }
    }
}