using System;

using System.Text;

public class Program

{

    public static void Main()

    {

            Console.WriteLine("Please enter the number of rows for your martini glass: ");

            var key = Console.ReadLine();

            int val = -1;

            if (int.TryParse(key, out val) == true)

            {

                MartiniGlass glass = new MartiniGlass();

                glass.PrintGlass(val);

            }

            else

                Console.WriteLine("Invalid entry");

​

            Console.WriteLine("Press any key to continue");

            Console.ReadLine();

    }

    public class MartiniGlass

        {

            public void PrintGlass(int iNumRows)

            {

                if (iNumRows <= 0)

                {

                    Console.WriteLine("Please enter a number greater than 0");

                    return;

                }

​

                StringBuilder sb = new StringBuilder();

                int iNumSpaces = 0;

​

                //First build the Os

                for (int i = iNumRows; i > 0; --i)

                {

                    //Put the front spaces in

                    sb.Append(' ', iNumSpaces);

​

                    //We know that the number of O is i + (i - 1)

                    int iNumOs = i + (i - 1);

                    sb.Append('O', iNumOs);

                    sb.Append(System.Environment.NewLine);

​

                    //Add to our space counter

                    iNumSpaces++;

                }

​

                //Now build the stem

                for (int i = 0; i < iNumRows; ++i)

                {

                    sb.Append(' ', iNumSpaces - 1);

                    sb.Append('|');

                    sb.Append(System.Environment.NewLine);

                }

​

                //Now build the base

                int iBaseCount = iNumRows + (iNumRows - 1);

                sb.Append('=', iBaseCount);

​

                Console.WriteLine(sb.ToString());

            }

        }

}