using System;

public class Program

{

      public static void DrawBox(int h, int w)

      {

         var hoz = new string('*', w);

         var vet = "*" + new string(' ', w-2) +"*";

​

         Console.WriteLine(hoz);

         for (var i = 0; i < h-2; i++)

            Console.WriteLine(vet);

         Console.WriteLine(hoz);

      }

      public static void Main()

      {

         DrawBox(5, 5);

      }

}