Question

I want to select elements from XDocument and add an attribute to each in a single lambda expression. This is what I’m trying:

  xhtml.Root.Descendants()
            .Where(e => e.Attribute("documentref") != null)
            .Select(e => e.Add(new XAttribute("documenttype", e.Attribute("documentref").Value)));

What is the correct way to do this?

Thanks!

Answer 1

  xhtml.Root.Descendants()
            .Where(e => e.Attribute("documentref") != null)
            .ToList()
            .ForEach(e => e.Add( new.... ) );