How to cast XPathEvalute when it can be XElement or XAttribute?

Question

So I have this code:

List prices =
                (from item in xmlDoc.Descendants(shop.DescendantXName)
                 select new PriceDet         


        

Answer 1

Dimitre's solution returns empty string if the element is not found; we can't distinguish it from actual empty value. So I had to make this extension method that handles multiple results by XPath query and returns empty enumeration if nothing is found:

public static IEnumerable GetXPathValues(this XNode node, string xpath)
{
    foreach (XObject xObject in (IEnumerable)node.XPathEvaluate(xpath))
    {
        if (xObject is XElement)
            yield return ((XElement)xObject).Value;
        else if (xObject is XAttribute)
            yield return ((XAttribute)xObject).Value;
    }
}