using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    enum MenuSelection

    {

        CreateCustomer = 1,

        CreateAccount = 2,

        SetAccountBalance = 3,

        DisplayAccountBalance = 4,

        Exit = 5,

        MaxMenuSelection = 5,

    }

    public static void Main()

    {

        Enum

            .GetNames(typeof(MenuSelection))

            .Select(name => new 

            { 

                name, 

                index = (int)Enum.Parse(typeof(MenuSelection), name, true) 

            })

            .Select(kv => $"[{kv.index}] " + String.Join(" ", SplitByCamelCase(kv.name)))

            .Select(item => 

            {

                Console.WriteLine(item);

                return true;

            })

            .ToList();

    }

    public static bool IsLower(char ch) 

    {

        return ch >= 'a' && ch <= 'z';

    }

    public static string Head(string str)

    {

        return new String(

                    str

                        .Take(1)

                        .Concat(

                            str

                                .Skip(1)

                                .TakeWhile(IsLower)

                        )

                        .ToArray()

                );

    }

    public static string Tail(string str)

    {

        return new String(str.Skip(Head(str).Length).ToArray());

    }

    public static IEnumerable<string> SplitByCamelCase(string str) 

    {

        if (str.Length == 0) 

            return new List<string>();

        return 

            new List<string> 

            { 

                Head(str) 

            }

            .Concat(

                SplitByCamelCase(

                    Tail(str)

                )

            );

    }

}