Effective way in LINQ of joining based on index

Question

I have written code that works, but I can't seem to find a better way to combine the lists together if they have the same index.

    class Apple {};
    class Carrot {};

    var apples = new list<Apple>();
    var carrot = new list<Carrot>();

    var combine = from a in apples
                  from c in carrots
                  where apples.IndexOf(a) == carrots.IndexOf(c)
                  select new {a, c};

(When I say combine, I don't mean append to the end of the list. {{a,b},{a,b}, .... { }}: Maybe I have the terminology wrong when trying to research.)

Answer 1

You can use Enumerable.Zip:

var combine = apples.Zip(carrots, (a, c) => new { Apple = a, Carrot = c});

Answer 2

apples.Select((a,i)=> new { Apple = a, Carrot = carrots[i] });

That should work too.