2016-12-30_21-29-50.txt

            Console.WriteLine("Please enter lines count : ");
            int lines = int.Parse(Console.ReadLine());

            //line count = 5
            //4 spaces, i = 1,last number = 1
            //3 spaces, i = 2,last number = 3
            //2 spaces, i = 3,last number = 5
            //1 space, i = 4,last number = 7
            //0 space, i = 5,last number = 9

            for (int i = 1; i <= lines; i++)
            {
                int spaces = lines - i;
                int last_number = i * 2 - 1;

                for (int s = 1; s <= spaces * 2 ; s++)
                {
                    Console.Write(" ");
                }
                for (int j = 1; j <= last_number; j++)
                {
                    Console.Write(j);
                    Console.Write(" ");
                }
                Console.WriteLine();
            }