Split List into Sublists with LINQ

Question

Is there any way I can separate a List into several separate lists of SomeObject, using the item index as the delimiter of each s

Answer 1

This is an old question but this is what I ended up with; it enumerates the enumerable only once, but does create lists for each of the partitions. It doesn't suffer from unexpected behavior when ToArray() is called as some of the implementations do:

    public static IEnumerable> Partition(IEnumerable source, int chunkSize)
    {
        if (source == null)
        {
            throw new ArgumentNullException("source");
        }

        if (chunkSize < 1)
        {
            throw new ArgumentException("Invalid chunkSize: " + chunkSize);
        }

        using (IEnumerator sourceEnumerator = source.GetEnumerator())
        {
            IList currentChunk = new List();
            while (sourceEnumerator.MoveNext())
            {
                currentChunk.Add(sourceEnumerator.Current);
                if (currentChunk.Count == chunkSize)
                {
                    yield return currentChunk;
                    currentChunk = new List();
                }
            }

            if (currentChunk.Any())
            {
                yield return currentChunk;
            }
        }
    }