using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("How many rows do you want?? Pick 1-10");

         string numbers = string.Empty;

        numbers = Console.ReadLine();

        for(int row = 1;  row <= Convert.ToInt32(numbers); row++)

        {

            for(int column =1; column <= row; column++)

            {

                Console.Write("{0,1}", "*");

            }

            Console.WriteLine();

        }

        for(int row = 0;  row <= Convert.ToInt32(numbers); row++)

        {

            for(int column = Convert.ToInt32(numbers); column >= row; column--)

            {   

                Console.Write("{0,1}", "*");

            }

            Console.WriteLine();  

        }

    }

}

​