Untitled

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            mainMenu();
            Console.WriteLine("Thank you for using the City Gym App, Goobye!");
        }

        static void mainMenu()
        {
            string appName = "City Gym App"; //Aoolication name
            string appVersion = "1.0"; //Application version
            bool quit = false; //when true will quit application
            while (!quit)
            {
                Console.WriteLine("Welcome to " + appName + appVersion);

                Console.WriteLine("1. BMI Calculator");
                Console.WriteLine("2. Membership Rates");
                Console.WriteLine("Please enter the number of your menu selection (0 to exit)");
                string menuSelection = Console.ReadLine();

                switch (menuSelection)
                {
                    case "0":
                        quit = true;
                        break;
                    case "1":
                        quit = BMI_Calculator();
                        break; /*if return true, start menu again? */
                    case "2":
                        quit = membershipRates();
                        break;
                    default:
                        Console.WriteLine("Please enter a valid number");
                        continue;
                }

            }
        }

        static bool BMI_Calculator() //BMI Calculator funciton
        {
            float userWeight;
            float userHeight;
            bool running = true;

            while (running)
            {
                Console.WriteLine("Welcome to the BMI Calculator");
                Console.WriteLine("To return to main menu at any time, type 0");
                Console.WriteLine("Please enter your weight in kg");
                userWeight = float.Parse(Console.ReadLine()); //Get users weight
                if (userWeight != 0) //check if quitting application or entering weight
                {
                    Console.WriteLine("Please enter your height in metres");
                    userHeight = float.Parse(Console.ReadLine()); //get users height
                    if (userHeight != 0) //check if quitting application or entering height
                    {
                        float BMI = (userWeight / (userHeight * userHeight)); //BMI Calculation
                                                                              //BMI Results
                        if (BMI < 18.5)
                        {
                            Console.WriteLine("Your BMI is " + BMI + "Underweight");
                        }
                        else if (BMI >= 18.5 && BMI < 24.9)
                        {
                            Console.WriteLine("Your BMI is " + BMI + "Normal");
                        }
                        else if (BMI > 25 && BMI < 30)
                        {
                            Console.WriteLine("Your BMI is " + BMI + "Overweight");
                        }
                        else if (BMI >= 30)
                        {
                            Console.WriteLine("Your BMI is " + BMI + "Obese");
                        }
                    }
                    else
                    {
                        return false;
                    }
                }
                else
                {
                    return false;
                }
            }
            return false;
        }

        static bool membershipRates()
        {
            bool running = true;
            bool quit = false;
            while (running)
            {
                Console.WriteLine("To see membership rates, please enter the number of the membership");
                Console.WriteLine("1. Basic");
                Console.WriteLine("2. Regular");
                Console.WriteLine("3. Premium");
                Console.WriteLine("Please enter your selection (0 to return to Main Menu, 9 to Quit)");
                string rateSelection = Console.ReadLine();
                    switch (rateSelection)
                    {
                        case "0":
                            running = false;
                            break;

                        case "9":
                            running = false;
                            quit = true;
                            break;

                        case "1":
                            Console.WriteLine("Basic membership is $10 weekly or $40 monthly");
                            break;
                        case "2":
                            Console.WriteLine("Regular membership is $15 weekly or $60 monthly");
                            break;
                        case "3":
                            Console.WriteLine("Premium membership is $20 weekly or $80 monthly");
                            break;

                    }
            }
            return quit;
        }

    }
}