Parallel iteration in C#?

Question

Is there a way to do foreach style iteration over parallel enumerables in C#? For subscriptable lists, I know one could use a regular for loop iterati

Answer 1

If you want to stick to the basics - I rewrote the currently accepted answer in a simpler way:

    public static IEnumerable Combine (this IEnumerable> sources)
    {
        var enums = sources
            .Select (s => s.GetEnumerator ())
            .ToArray ();

        while (enums.All (e => e.MoveNext ())) {
            yield return enums.Select (e => e.Current).ToArray ();
        }
    }

    public static IEnumerable Combine (params IEnumerable[] sources)
    {
        return sources.Combine ();
    }