using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        //Basically you can use multiple form clauses

        List<string> phrases = new List<string>() { "an apple a day", "the quick brown fox" };

        var query = (from phrase in phrases

                     from word in phrase.Split(' ')

                     select word

                     );

        foreach(string word in query)

            Console.WriteLine(word);

​

    }

}