ДЗ: Split

using System;

namespace CSLight
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string sentence = "Под лежачий камень и вода не течет";
            string [] words = sentence.Split();

            for (int i = 0; i < words.Length; i++)
            {
                Console.WriteLine(words[i]);
            }

            Console.ReadKey();
        }
    }
}