using System;

using System.Linq;

using System.Xml;

using System.Xml.Linq;

using System.Runtime.Serialization;

​

public class Program

{

    public static void Main()

    {

        string XML = @"<RequisitionRequest>

<Authentication>

<PartnerID>Provided By Client</PartnerID>

<SharedSecret>Provided By client</SharedSecret>

<PartnerVersion>client</PartnerVersion>

<IntegrationVersion>Provided By Agile1</IntegrationVersion>

<ClientDBKey>Provided By Agile1</ClientDBKey>

<RequestorID>J234</RequestorID>

</Authentication>

<JobPosting>

<ClientReferenceID>C112</ClientReferenceID>

<Requisition>

 <LanguageID>1</LanguageID>

</Requisition>

</JobPosting>

​

<Authentication>

<PartnerID>Provided By client</PartnerID>

<SharedSecret>Provided By client</SharedSecret>

<PartnerVersion>client</PartnerVersion>

<IntegrationVersion>Provided By client</IntegrationVersion>

<ClientDBKey>Provided By client</ClientDBKey>

<RequestorID>33234</RequestorID>

</Authentication>

<JobPosting>

<ClientReferenceID>C100</ClientReferenceID>

<Requisition>

  <LanguageID>2</LanguageID>

</Requisition>

</JobPosting>

</RequisitionRequest>";

        XElement element = XElement.Parse(XML);

        var Result =

            from a in element.Descendants("Authentication")from b in element.Descendants("JobPosting")from c in b.Descendants("Requisition")select new

            {

            PartnerID = a.Element("PartnerID").Value, SharedSecret = a.Element("SharedSecret").Value, PartnerVersion = a.Element("PartnerVersion").Value, IntegrationVersion = a.Element("IntegrationVersion").Value, ClientDBKey = a.Element("ClientDBKey").Value, RequestorID = a.Element("RequestorID").Value, ClientReferenceID = b.Element("ClientReferenceID").Value, LanguageID = c.Element("LanguageID").Value

            }

​

        ;

        foreach (var item in Result)

        {

            Console.WriteLine(item);

        }

    }

}