Find indices of particular items in the list using linq

Question

I have a list of integers from 1 to 20. I want the indices of items which are greater than 10 using linq. Is it possible to do with linq?

Thanks in advance

Answer 1

    public static List FindIndexAll(this List src, Predicate value)
    {
        List res = new List();
        var idx = src.FindIndex(x=>x>10);           
        if (idx!=-1) {
        res.Add(idx);
         while (true)
         {
            idx = src.FindIndex(idx+1, x => x > 10);
            if (idx == -1)
                break;
            res.Add(idx);
         }
        }
        return res;
    }

Usage

        List  test= new List() {1,10,5,2334,34,45,4,4,11};
        var t = test.FindIndexAll(x => x > 10);