Split功能的思想实现

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            string astring = "Now is time for all good people";
            ArrayList list_words = SplitWords(astring);
            foreach (string word in list_words)
            {
                Console.WriteLine(word);
            }
            Console.ReadKey();
        }

        static ArrayList SplitWords(string s)
        {
            ArrayList words = new ArrayList();

            int pos = s.IndexOf(" ");

            while (pos > 0)
            {
                string word = s.Substring(0, pos);
                words.Add(word);
                s = s.Substring(pos + 1, s.Length - (pos + 1));
                pos = s.IndexOf(" ");
                if (pos == -1)
                {
                    word = s.Substring(0,s.Length);
                    words.Add(word);
                }
            }
            return words; 
        }

    }
}