Exam 1. Drawing_Sunglasses

namespace _17.Sunglasses
{
    using System;

    public class DrawSunglasses
    {
        public static void Main(string[] args)
        {
            checked
            {
                // Enter and read height of sunglasses, always an odd number:
                byte numN = byte.Parse(Console.ReadLine());

                // Calculating number (width) of Frames:
                byte countFrames = (byte)(2 * numN);

                // Calculating number (width) of Lenses:
                byte countLenses = (byte)(countFrames - 2);

                // Create string for Top or Bottom row Frame:
                string topBottomFrame = new string('*', countFrames);

                // Create string for Whitespace on row between Left and Right Frames:
                string whitespaceBetweenFrames = new string(' ', numN);

                // Create string for Lens on row:
                string lens = new string('/', countLenses);
                lens = '*' + lens + '*';

                // Create string for Bridge between Left and Right Frames on middle row:
                string bridge = new string('|', numN);

                // Print created strings and drawing Sunglasses:
                for (int row = 0; row < numN; row++)
                {
                    if (row == 0 || row == numN - 1)
                    {
                        // Print Frames on Top and Bottom row:
                        Console.WriteLine("{0}{1}{0}", topBottomFrame, whitespaceBetweenFrames);
                    }
                    else if (row == numN / 2)
                    {
                        // Print Frames and Bridge on middle row:
                        Console.WriteLine("{0}{1}{0}", lens, bridge);
                    }
                    else
                    {
                        // Print Lenses on other rows:
                        Console.WriteLine("{0}{1}{0}", lens, whitespaceBetweenFrames);
                    }
                }
            }
        }
    }
}