What is the most elegant way to get a set of items by index from a collection?

Question

Given

IList indexes;
ICollection collection;

What is the most elegant way to extract all T in

Answer 1

Here's a faster version:

IEnumerable ByIndices(ICollection data, IList indices)
{
    int current = 0;
    foreach(var datum in data.Select((x, i) => new { Value = x, Index = i }))
    {
        if(datum.Index == indices[current])
        {
            yield return datum.Value;
            if(++current == indices.Count)
                yield break;
        }
    }
}