using System;

using System.Collections.Generic;

using System.Xml;

using System.Xml.Linq;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var xml = @"<SelectedService>

<Service>

 <servicename>updatemapInt</servicename>

 <seq>1</seq>

 <serviceURL>http://XXX.XXXX.net/Service1.svc?wsdl</serviceURL>

<inputs>

 <input>System.Int</input>

 <input>System.Int</input>

 </inputs>

 <Output>System.String</Output>

 </Service>

 </SelectedService>";

        var xelement = XElement.Parse(xml);

        //List<string> serviceinputs = (from servinput in xelement.Elements("Service").Elements("inputs").Elements("input")

        //                                  let inp = (string)servinput

        //                                  orderby inp

        //                                  select inp).ToList();

        List<string> serviceinputs = (from service in xelement.Elements("Service")

                                      from servinput in service.Element("inputs").Elements("input")

                                      let inp = (string)servinput

                                      orderby inp

                                      select inp).ToList();

        foreach(var serviceInput in serviceinputs)

        {

            Console.WriteLine(serviceInput);

        }

    }

}