Change Number To Words in C#

Recently in my current project I encountered the requirement to generate a customer invoice with the total amount converted into its verbal representation; for example:
200 is "Two Hundred"

5150.20 is "Five thousand one hundred fifty rupees and twenty paisa"

Before I wrote my own code I first googled it but unfortunately (or may be am a bad Googler) I didn't get any solution that can convert numbers into words (Indian Format) so I decided to better write my own solution rather than wasting time on Google, I had a basic idea of how to do it and after doing a lot of code-reengineering I finally ended up with working code.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.Threading;

using System.Collections;

 

namespace ConsoleApplication3

{

 

    class Program

    {

 

 

        static void Main(string[] args)

 

        {

            Console.WriteLine("Do You wish to coninue Y/N");

            while (Console.ReadLine().ToLower() != "n")

            {

                Console.WriteLine("Enter Number");

                string s = Console.ReadLine();

                ConvertMyword(int.Parse(s));

                Console.WriteLine("Do You wish to coninue Y/N");

              

            }

                      

 

        }

 

        static void ConvertMyword(int number)

        {

            int flag = 0;

            int lflag = 0;

            string words = String.Empty;

            string[] places = { "ones", "ten", "hundred", "thousand", "ten thousand", "lacs","tenlacs","crore","tencrore","Billon" };

            string rawnumber = number.ToString();

            char[] a = rawnumber.ToCharArray();

            Array.Reverse(a);

            if (a.Length >= 2)

            {

                for (int i = a.Length - 1; i >= 0; i--)

                {

                    if (i % 2 == 0 && i > 2)

                    {

                        if (int.Parse(a[i].ToString()) > 1)

                        {

                            if (int.Parse(a[i - 1].ToString()) == 0)

                            {

                                words = words + getNumberStringty(int.Parse(a[i].ToString())) + " " + places[i - 1] + " ";

                            }

                            else

                            {

                                words = words + getNumberStringty(int.Parse(a[i].ToString())) + " ";

                            }

                        }

                        else if (int.Parse(a[i].ToString()) == 1)

                        {

                            if (int.Parse(a[i - 1].ToString()) == 0)

                            {

                                words = words + "Ten" + " ";

                            }

                            else

                            {

                                words = words + getNumberStringteen(int.Parse(a[i - 1].ToString())) + " ";

                            }

                            flag = 1;

                        }

                    }

                    else

                    {

                        if (i == 1 || i == 0)

                        {

                            if (int.Parse(a[i].ToString()) > 1)

                            {

                                words = words + getNumberStringty(int.Parse(a[i].ToString())) + " " + getNumberString(int.Parse(a[0].ToString())) + " ";

                                break;

                            }

                            else if (int.Parse(a[i].ToString()) == 1)

                            {

                                if (int.Parse(a[i - 1].ToString()) == 0)

                                {

                                    words = words + "Ten" + " ";

                                }

                                else

                                {

                                    words = words + getNumberStringteen(int.Parse(a[i - 1].ToString())) + " ";

                                }

 

                                break;

                            }

                            else if (int.Parse(a[i - 1].ToString()) != 0)

                            {

                                words = words + getNumberString(int.Parse(a[i - 1].ToString())) + " ";

                                break;

                            }

                            else

                            {

                                break;

                            }

                        }

                        else

                        {

                            if (flag == 0)

                            {

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

                                {

                                    if (int.Parse(a[l].ToString()) != 0)

                                    {

                                        lflag = 1;

                                    }

                                }

                                if (lflag == 1 && int.Parse(a[i].ToString()) != 0)

                                {

 

                                    words = words + getNumberString(int.Parse(a[i].ToString())) + " " + places[i] + " ";

                                    lflag = 0;

 

 

                                }

                                else if (lflag == 0)

                                {

                                   

                                    lflag = 0;

                                    break;

                                }

 

                            }

                            else

                            {

                                words = words + " " + places[i] + " ";

                                flag = 0;

                            }

 

                        }

                    }

                }

            }

            else

            {

                words = getNumberString(int.Parse(a[0].ToString()));

            }

            Console.WriteLine(words);

        }

        static string getNumberString(int num)

        {

            string Word = String.Empty;

            switch (num)

            {

                case 1:

                    Word = "one";

                    break;

                case 2:

                    Word = "two";

                    break;

 

                case 3:

                    Word = "three";

                    break;

 

                case 4:

                    Word = "four";

                    break;

 

                case 5:

                    Word = "five";

                    break;

 

                case 6:

                    Word = "six";

                    break;

                case 7:

                    Word = "seven";

                    break;

 

                case 8:

                    Word = "eight";

                    break;

 

                case 9:

                    Word = "nine";

                    break;

 

 

            }

            return Word;

        }

        static string getNumberStringty(int num)

        {

            string Word = String.Empty;

            switch (num)

            {

 

                case 2:

                    Word = "twenty";

                    break;

 

                case 3:

                    Word = "thirty";

                    break;

 

                case 4:

                    Word = "fourty";

                    break;

 

                case 5:

                    Word = "fifty";

                    break;

 

                case 6:

                    Word = "sixty";

                    break;

                case 7:

                    Word = "seventy";

                    break;

 

                case 8:

                    Word = "eighty";

                    break;

 

                case 9:

                    Word = "ninty";

                    break;

 

 

            }

            return Word;

        }

        static string getNumberStringteen(int num)

        {

            string Word = String.Empty;

            switch (num)

            {

                    case 1:

                    Word = "eleven";

                    break;

                case 2:

                    Word = "tewlve";

                    break;

 

                case 3:

                    Word = "thirteen";

                    break;

 

                case 4:

                    Word = "fourteen";

                    break;

 

                case 5:

                    Word = "fifteen";

                    break;

 

                case 6:

                    Word = "sixteen";

                    break;

                case 7:

                    Word = "seventeen";

                    break;

 

                case 8:

                    Word = "eighteen";

                    break;

 

                case 9:

                    Word = "ninteen";

                    break;

 

 

            }

            return Word;

        }

    }

 

}