split

using System;

internal class Program
{
    static void Main(string[] args)
    {
        char spaceInText = ' ';

        Console.Write("Введите текст: ");

        string textLine = Console.ReadLine();
        string[] words = textLine.Split(spaceInText);

        foreach (string word in words)
        {
            Console.WriteLine(word);
        }
    }
}