No XmlDocument and XDocument in VS2010 Express for Windows Phone - windows-phone-7

Question

I use MS Studio 2010 Express for Windows Phone to build the app. In my app, I got the http respond and read it in string then I deserializer into the class object. It works fine in the class without List collection as a property. When it deserializer the class with List property, it got the error like this
Error in line 12 position 5. Expecting state 'Element'.. Encountered 'EndElement' with name 'ContactList', namespace 'http://schemas.datacontract.org/2004/07/DataObjects’.
I think I can read the xml and assign the value into the class. I searched to read xml file and a lot of website mentions to use XDocument .Prase method or xlmDocument.Load. However event adding the System.Xml.Ling as reference , I still cannot see XDocument .Parse method or xlmDocument . Would someone tell me what I should do in order to assign the following value into the class?
There is my class object:
public class CallDetails
{
public int id { get; set; }
public string summary { get; set; }
public string errorMsg { get; set; }
public int parentCallid { get; set; }
public string parentCallURL { get; set; }
public string assignedTo { get; set; }
public string OrgName { get; set; }
public DateTime onHoldSince { get; set; }
public DateTime onHoldUntil { get; set; }
public string requester { get; set; }
public bool isOnHold { get; set; }
private List<Contact> m_ContactList = new List<Contact>();
public List<Contact> ContactList
{
get { return m_ContactList; }
}
}
There is the respond:
<?xml version="1.0" encoding="utf-8"?><CallDetails xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/DataObjects">
<ContactList>
<Contact>
<Method>PriPhone</Method>
<Number>[phone]</Number>
</Contact>
<Contact>
<Method>Fax</Method>
<Number>[phone]</Number>
</Contact>
</ContactList>
<errorMsg
i:nil="true" />
<id>0</id>
<isOnHold>false</isOnHold>
<onHoldSince>0001-01-01T00:00:00</onHoldSince>
<onHoldUntil>0001-01-01T00:00:00</onHoldUntil>
<parentCallURL>/Call/349551</parentCallURL>
<parentCallid>0</parentCallid>
<requester>Peter </requester>
<summary>Mobile Application Research</summary>
</CallDetails>

Answer 1

Just adding the reference to System.Xml.Linq won't do it, you also need to reference the namespace in the class header:
using System.Xml.Linq;
Then you can call something like XDocument doc = XDocument.Parse(content);. However, from what I can tell, you are trying to deserialize data, so you might want to use the XmlSerializer class instead for all the core work. You can find some code 'ispiration' here.

Answer 2

I found it that the CallDetail Class cause error. It should be like that
public List<Contact> ContactList { get; set; }