LINQ Batch Enumerable

EnumerableExtensions.cs

using System.Collections.Generic;
using System.Linq;

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