using System;

​

using System.Text;

public class Program

{

    public static void Main(string[] args)

        {

            Console.WriteLine("--------------------------Printing 4th glass--------------------------");

            PrintGlass(4);

            Console.WriteLine("--------------------------Printing 5th glass--------------------------");

            PrintGlass(5);

            Console.WriteLine("--------------------------Printing 8th glass--------------------------");

            PrintGlass(8);

​

            Console.ReadLine();

​

        }

​

        static void PrintGlass(int iterations)

        {

            if(iterations <= 0 )

            {

                throw new ArgumentOutOfRangeException("iterations parameter can't be less than or equal to zero");

            }

​

            int topAndBottom = (2 * iterations) - 1;

            StringBuilder buffer = new StringBuilder();

            var spaceCounter = 0;

            var space = "";

​

            //gather top 

            for(var i = topAndBottom; i > 0; i = i -2)

            {

                var circles = new string('0', i);

                space = spaceCounter == 0 ? "" : new string(' ', spaceCounter);

                buffer.AppendLine(string.Format("{0}{1}", space, circles));

                spaceCounter++;

            }

​

            //gather center

            for (var i = 1; i <= iterations;i++)

            {

                buffer.AppendLine(string.Format("{0}|", space));

            }

​

            //gather base

            var baseLine = new string('=', topAndBottom);

            buffer.AppendLine(baseLine);

​

            Console.Write(buffer.ToString());

        }

}