using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var list = FindProductsByName("green shirt", 4);

        foreach (var products in list)

            Console.WriteLine(products.ProductName);

    }

​

    public static IEnumerable<Products> FindProductsByName(string query, int limit)

    {

        string[] words = query.ToLower().Split(' ');

        List<Products> products = new List<Products>

        {

            new Products { ProductName = "green t-shirt large" },

            new Products { ProductName = "t-shirt green medium" },

            new Products { ProductName = "t-shirt red" }

        };

        return

            (from p in products         

            where words.All(w=> p.ProductName.Contains(w))

            select p).Take(limit);

    }

​

    public class Products

    {

        public string ProductName { get; set; }

    }

}