First Steps in Coding - 08. Square of Stars (with FOR-loops)

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

namespace _05_08_1_Square_of_Stars
{
    class Program
    {
        static void Main(string[] args)
        {
            var N = int.Parse(Console.ReadLine());
            if (N >= 2 && N <= 100)
            {
                for (int i = 1; i <= N; i++)
                {
                    Console.Write("*");
                    for (int j = 2; j <= (N - 1); j++)
                    {
                        if (i == 1 || i == N)
                        {
                            Console.Write("*");
                        }
                        else
                        {
                            Console.Write(" ");
                        }
                    }
                    Console.WriteLine("*");
                }
            }
        }
    }
}