Batching with LINQ

static IEnumerable<IEnumerable<T>> Batch<T>(this IEnumerable<T> source, int batchSize)
{
    return source.Select((item, inx) => new { item, inx })
    			 .GroupBy(x => x.inx / batchSize)
				 .Select(g => g.Select(x => x.item));
}

https://stackoverflow.com/questions/13731796/create-batches-in-linq