gistfile1.txt

class Program
    {
        static void Main(string[] args)
        {
        }

        private IEnumerable<dynamic> Parse()
        {
            for (int i = 0; i < 10; i++)
            {
                var emptyItem = new { };
                yield return GetBuilder(new[] { new { }, new { } })(emptyItem, new[] { new { } });
            }
        }

        private Func<dynamic, IEnumerable<dynamic>, dynamic> GetBuilder(IEnumerable<dynamic> columns)
        {
            Func<dynamic, IEnumerable<dynamic>, dynamic> start = (i, e) => i;
            foreach (dynamic column in columns)
            {
                start += (Func<dynamic, IEnumerable<dynamic>, dynamic>)((i, e) => { i.FooBar = ""; return i; });
            }
            return start;
        }
    }