Conditional Statements - problem 11

using System;

    class ConvertNumberToText
    {
        static void Main()
        {
            int number = 0;
            Console.Write("Enter number from 0 to 999: ");
            int tempNumber, tempNumber2, digit, tens, hundred, elevenToNineteen, tenToNinety;
            string digitStr, tensStr, hundredStr, elevenToNineteenStr, tenToNinetyStr;
            bool enteredString = Int32.TryParse(Console.ReadLine(), out number);

            if (number >= 100)
            {
                if (number == 100 || number == 200 || number == 300 || number == 400 || number == 500 || number == 600 || number == 700 || number == 800 || number == 900)
                {
                    hundred = number;
                    switch (hundred)
                    {
                        case 100: hundredStr = "One hundred."; Console.WriteLine(hundredStr); break;
                        case 200: hundredStr = "Two hundred."; Console.WriteLine(hundredStr); break;
                        case 300: hundredStr = "Three hundred."; Console.WriteLine(hundredStr); break;
                        case 400: hundredStr = "Four hundred."; Console.WriteLine(hundredStr); break;
                        case 500: hundredStr = "Five hundred."; Console.WriteLine(hundredStr); break;
                        case 600: hundredStr = "Six hundred."; Console.WriteLine(hundredStr); break;
                        case 700: hundredStr = "Seven hundred."; Console.WriteLine(hundredStr); break;
                        case 800: hundredStr = "Eight hundred."; Console.WriteLine(hundredStr); break;
                        case 900: hundredStr = "Nine hundred."; Console.WriteLine(hundredStr); break;
                        default: break;
                    }
                }
                else
                {
                    hundred = number / 100;
                    switch (hundred)
                    {
                        case 1: hundredStr = "One hundred and "; Console.Write(hundredStr); break;
                        case 2: hundredStr = "Two hundred and "; Console.Write(hundredStr); break;
                        case 3: hundredStr = "Three hundred and "; Console.Write(hundredStr); break;
                        case 4: hundredStr = "Four hundred and "; Console.Write(hundredStr); break;
                        case 5: hundredStr = "Five hundred and "; Console.Write(hundredStr); break;
                        case 6: hundredStr = "Six hundred and "; Console.Write(hundredStr); break;
                        case 7: hundredStr = "Seven hundred and "; Console.Write(hundredStr); break;
                        case 8: hundredStr = "Eight hundred and "; Console.Write(hundredStr); break;
                        case 9: hundredStr = "Nine hundred and "; Console.Write(hundredStr); break;
                        default: break;
                    }
                }
            }
            if (number % 10 == 0)
            {
                tempNumber = number / 100;
                tempNumber *= 100;
                tenToNinety = number - tempNumber;
                switch (tenToNinety)
                {
                    case 10: tenToNinetyStr = "ten."; Console.WriteLine(tenToNinetyStr); break;
                    case 20: tenToNinetyStr = "twenty."; Console.WriteLine(tenToNinetyStr); break;
                    case 30: tenToNinetyStr = "thirty."; Console.WriteLine(tenToNinetyStr); break;
                    case 40: tenToNinetyStr = "forty."; Console.WriteLine(tenToNinetyStr); break;
                    case 50: tenToNinetyStr = "fifty."; Console.WriteLine(tenToNinetyStr); break;
                    case 60: tenToNinetyStr = "sixty."; Console.WriteLine(tenToNinetyStr); break;
                    case 70: tenToNinetyStr = "seveny."; Console.WriteLine(tenToNinetyStr); break;
                    case 80: tenToNinetyStr = "eighty."; Console.WriteLine(tenToNinetyStr); break;
                    case 90: tenToNinetyStr = "ninety."; Console.WriteLine(tenToNinetyStr); break;
                    default: break;
                }
            }
            if (number % 10 != 0)
            {
                tempNumber = number / 10;
                tempNumber2 = ((number / 100) * 10);
                tens = tempNumber - tempNumber2;
                if (tens != 1)
                {
                    switch (tens)
                    {
                        case 2: tensStr = "twenty "; Console.Write(tensStr); break;
                        case 3: tensStr = "thirty "; Console.Write(tensStr); break;
                        case 4: tensStr = "forty "; Console.Write(tensStr); break;
                        case 5: tensStr = "fifty "; Console.Write(tensStr); break;
                        case 6: tensStr = "sixty "; Console.Write(tensStr); break;
                        case 7: tensStr = "seveny "; Console.Write(tensStr); break;
                        case 8: tensStr = "eighty "; Console.Write(tensStr); break;
                        case 9: tensStr = "ninety "; Console.Write(tensStr); break;
                        default: break;
                    }
                    tempNumber = (number / 10) * 10;
                    digit = number - tempNumber;
                    switch (digit)
                    {
                        case 1: digitStr = "one."; Console.WriteLine(digitStr); break;
                        case 2: digitStr = "two."; Console.WriteLine(digitStr); break;
                        case 3: digitStr = "three."; Console.WriteLine(digitStr); break;
                        case 4: digitStr = "four."; Console.WriteLine(digitStr); break;
                        case 5: digitStr = "five."; Console.WriteLine(digitStr); break;
                        case 6: digitStr = "six."; Console.WriteLine(digitStr); break;
                        case 7: digitStr = "seven."; Console.WriteLine(digitStr); break;
                        case 8: digitStr = "eight."; Console.WriteLine(digitStr); break;
                        case 9: digitStr = "nine."; Console.WriteLine(digitStr); break;
                        default: break;
                    }

                }
                else
                {
                    tempNumber = (number / 10) * 10;
                    elevenToNineteen = number - tempNumber;
                    switch (elevenToNineteen)
                    {
                        case 1: elevenToNineteenStr = "eleven."; Console.WriteLine(elevenToNineteenStr); break;
                        case 2: elevenToNineteenStr = "twelve."; Console.WriteLine(elevenToNineteenStr); break;
                        case 3: elevenToNineteenStr = "thirteen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 4: elevenToNineteenStr = "fourteen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 5: elevenToNineteenStr = "fifteen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 6: elevenToNineteenStr = "sixteen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 7: elevenToNineteenStr = "seventeen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 8: elevenToNineteenStr = "eighteen."; Console.WriteLine(elevenToNineteenStr); break;
                        case 9: elevenToNineteenStr = "nineteen."; Console.WriteLine(elevenToNineteenStr); break;
                    default: break;
                    }
                }

            }
            if (number == 0)
            {
                Console.WriteLine("zero.");
            }
        }
    }