gistfile1.cs

    public static class ReadAllLinesHelper
    {
        public static IEnumerable<string> For(this string[] lines)
        {
            return lines;
        }

        public static IEnumerable<T> EachLineWeCareAbout<T>(this IEnumerable<string> lines, IParser parser)
        {
            return lines.Where(parser.CanParse).Select(parser.Parse) as IEnumerable<T>;
        }

        public static IEnumerable<T> Save<T>(this IEnumerable<T> items, IRepository<T> repo)
        {
            items.Each(repo.Save);
            return items;
        }
    }