using System;
using System.Collections.Generic;
using System.Linq;


public class Test
{
	
	public class Article {
        public string Name { get; set; }
        public string Colour { get; set; }
    }
	
	public static void Main()
	{
		var list = new List<Article> {
            new Article { Name = "Article1, Article2, Article3", Colour = "Red" }
        ,   new Article { Name = "Article4, Article5, Article6", Colour = "Blue" }
        };
        var res = list.SelectMany(
            art => art.Name.Split(',').Select(n =>
                new Article {
                    Name = n.Trim()
                ,   Colour = art.Colour
                }
            )
        );
        foreach (var a in res) {
        	Console.WriteLine("{0} : {1}", a.Name, a.Colour);
        }
	}
}