splits an ienumerable into groups of count n

split enumerable into groups of n

public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> source, int countPerList)
{
    if (source == null || countPerList <= 0)
    {
        return Enumerable.Empty<IEnumerable<T>>();
    }

    return source
        .Select((x, i) => new { Index = i, Value = x })
        .GroupBy(x => x.Index / countPerList)
        .Select(x => x.Select(v => v.Value).ToList());
}