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CSharp · Console

/Program.cs

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)
				)
			);
	}
}