mithilesh kumar singh

class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Enter the row number");

            int n = int.Parse(Console.ReadLine());

            for (int row = 1; row <= n * 2 - 1; row++)

            {

                for (int coll = 1; coll <= n * 2 - 1; coll++)

                {

                    if (row == 1 || row == n * 2 - 1 || coll == 1 || coll == n * 2 - 1 || row == coll || coll == n || row == n || coll == 2 * n - row)

                    {

                        Console.Write("*" + " ");

                    } 

                    else 

                    { 

                        Console.Write("  ");

                    }

                }

                Console.WriteLine();

            }

            Console.ReadLine();

        }

    }