static class HelpSplit
    {
        public static IEnumerable<IEnumerable<T>> MySplit<T>(this IEnumerable<T> enumerable, uint countitems)
        {
            if (countitems == 0)throw new ArgumentNullException("countitems >0");
            var list = new List<T>();
            foreach (var item in enumerable)
            {
                list.Add(item);
                if (list.Count == countitems)
                {
                    yield return list;
                    list = new List<T>();
                }
            }
            if (list.Count > 0) yield return list;
        }
    }

 var ints = Enumerable.Repeat(22, 100);
 var ttt = ints.MySplit(30).ToList();