Split

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

namespace CSTemp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string text;
            string[] textSplit;

            Console.Write("Введите строку: ");
            text = Console.ReadLine();
            textSplit = text.Split(' ');
            foreach(var word in textSplit)
            {
                Console.WriteLine(word);
            }
            Console.ReadKey();
        }
    }
}