I want to select nodes which have attribute class with some value not specifying tag.

How to do it?

So far I have: 

```
html.DocumentNode.SelectNodes("//[@class='value']");

```

But it's not working good as far as I see it.

For instance, let me have this kind of HTML code:

```
<div>
  <div class="value"></div>
  <a class="value"></div>
</div>

```

it would need to give me back those 2 elements inside of `<div>`, so `<div>` and `<a>`. Is that possible?