LINQ where clause returns null

Question

I'm trying to get values from xml using LINQ. When I add where clause I get null. When I remove the where clause I get items from xml, but there's no property for 'Value'.

This is the xml I'm trying to get BatchId, ResultCode, and SearchId values from.

{<WsSearchReply xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <ExtensionData />
  <BatchId>6787350</BatchId>
  <Hits />
  <ResultCode>NO_HITS</ResultCode>
  <SearchId>67292500</SearchId>
</WsSearchReply>}

This returns 4 items:
IEnumerable<XNode> dps = from el in d.Root.Nodes()
                              select el;

this doesn't return any records:
IEnumerable<XNode> dps = from el in d.Root.Nodes()
                         where el.Equals("<ExtensionData />")
                         select el;

using System.Xml;
using System.Xml.Linq;

string text = Serializer.SerializeObject<CchSearchService.WsSearchReply>(reply, true);

XDocument d = new XDocument();
XElement e = XElement.Parse(text);
d.Add(e);

IEnumerable<XNode> dps = from el in d.Root.Nodes()
//where el.Equals("<ExtensionData />")
 select el;

foreach (XNode el in dps)
{
    string x = el.ToString();
    Console.WriteLine(el);
}

Answer 1

To get the ExtensionData elements you can simply use the following:

IEnumerable<XElement> dps = d.Root.Elements("ExtensionData");

which essentially is a quick way of doing this (you have suggested that you must use lync for this in a comment, the below code is unnecessary)

IEnumerable<XElement> dps = from el in d.Root.Elements() where el.Name.LocalName.Equals("ExtensionData") select el;

For further info, an XElement implements XNode . XNode is the base class and the Nodes enumerable can contain things other than elements such as comments (XComment) and does not have a name. If you use the Elements property you will only return XElement objects. The XElement class contains data relating to an Element eg the Element name