How do I get the index of the highest value in an array using LINQ?

Question

I have an array of doubles and I want the index of the highest value. These are the solutions that I\'ve come up with so far but I think that there must be a more elegant so

Answer 1

var scoreList = score.ToList();
int topIndex =
    (
      from x
      in score
      orderby x
      select scoreList.IndexOf(x)
    ).Last();

If score wasn't an array this wouldn't be half bad...