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C# LINQ to XML - Not Finding Elements or Descendants

I'm having trouble using LINQ to XML to read my xml file. I have attached a portion of the xml schema.

 <?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:mstns="http://tempuri.org/sdnList.xsd" xmlns="http://tempuri.org/sdnList.xsd" elementFormDefault="qualified" targetNamespace="http://tempuri.org/sdnList.xsd" id="sdnList">
  -<xs:element name="sdnList"> 
    -<xs:complexType> 
      -<xs:sequence> 
        -<xs:element name="publshInformation" maxOccurs="1"> 
         -<xs:complexType> 
          -<xs:sequence> 
             <xs:element name="Publish_Date" maxOccurs="1" minOccurs="0" type="xs:string"/> 
            <xs:element name="Record_Count" maxOccurs="1" minOccurs="0" type="xs:int"/> 
           </xs:sequence> 
          </xs:complexType> 
         </xs:element> 
       -<xs:element name="sdnEntry" maxOccurs="unbounded"> 
         -<xs:complexType> 
           -<xs:sequence> 
              <xs:element name="uid" type="xs:int"/> 
              <xs:element name="firstName" minOccurs="0" type="xs:string"/> 
              <xs:element name="lastName" type="xs:string"/> 
              <xs:element name="title" minOccurs="0" type="xs:string"/> 
              <xs:element name="sdnType" type="xs:string"/> 
              <xs:element name="remarks" minOccurs="0" type="xs:string"/> 

              ....CONTINUES FROM HERE

The code I'm using is as follows.

            XDocument doc = XDocument.Load("c:/OFACTemp/sdn.xml");

            var sdnEntry = from item in doc.Root.Descendants("sdnEntry")
                           select new
                           {
                               uid = item.Element("uid").Value,
                               firstName = item.Element("firstName").Value
                           };

            string test = "";
            foreach (var p in sdnEntry)
                test = "Id: " + p.uid + " First Name: " + p.firstName;  

When I break point through the code, doc loads fine and I see proper data. Doc.Root is populated but Descendants appears to have nothing. Then once down to my foreach statement the sdnEntry yields no results. This seems so simple but I can't figure out why I can't select anything. I've also tried using Elements in place of Descendants and same result. End result I need to take the xml and create C# objects.

In addition, a side question would be how would sdnEntry be handled if some sdnEntrys have for example a first name and others do not? If a first name doesn't exist for an sdnEntry then the firstName element tag doesn't even exist in the xml file. Any help would be greatly appreciated.

Here's a sample of the xml.

<?xml version="1.0" standalone="true"?>
-<sdnList xmlns="http://tempuri.org/sdnList.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
  -<publshInformation> 
     <Publish_Date>05/16/2013</Publish_Date> 
     <Record_Count>5493</Record_Count>
   </publshInformation> 
   -<sdnEntry> 
     <uid>10</uid> 
     <lastName>ABASTECEDORA NAVAL Y INDUSTRIAL, S.A.</lastName> 
     <sdnType>Entity</sdnType> 
    -<programList> 
       <program>CUBA</program> 
     </programList> 
    -<akaList> 
      -<aka> 
         <uid>4</uid> 
         <type>a.k.a.</type> 
         <category>strong</category> 
         <lastName>ANAINSA</lastName> 
       </aka> 
     </akaList> 
    -<addressList> 
      -<address> 
         <uid>7</uid> 
         <country>Panama</country> 
         </address> 
     </addressList>  
   </sdnEntry>

You need to take the default namespace into account, with LINQ to XML you do that by declaring

XNamespace df = "http://tempuri.org/sdnList.xsd";

or alternatively dynamically with

XNamespace df = doc.Root.Name.Namespace;

then you need to use the XNamespace object to construct XName s in your query with eg

       var sdnEntry = from item in doc.Root.Descendants(df + "sdnEntry")
                       select new
                       {
                           uid = (string)item.Element(df + "uid"),
                           firstName = (string)item.Element(df + "firstName")
                       };

removing this part from the top line worked for me. I have no idea why its like this. but it worked. xmlns:mstns="http://tempuri.org/sdnList.xsd"

I ended up using the XmlSerializer to solve my issue. Once the xml file was downloaded via FTP I used the following code. I was then able to use C# to populate my C# objects.

FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();               
StreamReader sreader = new StreamReader(responseStream);
string xmlString = sreader.ReadToEnd();        
XmlSerializer serializer = new XmlSerializer(typeof(sdnList));
TextReader reader = new StringReader(xmlString); 
sdnList = (sdnList)serializer.Deserialize(reader);

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