3.6 Split

using System;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            String UserString;

            Console.WriteLine("Введите строку:");
            UserString = Convert.ToString(Console.ReadLine());

            string[] words = UserString.Split(' ');
            foreach (var word in words)
            {
                Console.WriteLine(word);
            }
        }
    }
}