using System;

using System.Linq;

using System.Xml;

using System.Xml.Linq;

public class Program

{

    public static void Main()

    {

        string xml = @"<OTA_AirLowFareSearchRS xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" Version=""1.9.2"" PricedItinCount=""1"" BrandedOneWayItinCount=""0"" SimpleOneWayItinCount=""0"" DepartedItinCount=""0"" SoldOutItinCount=""0"" AvailableItinCount=""0"">

    <Success xmlns=""http://www.opentravel.org/OTA/2003/05""/>

    <Warnings xmlns=""http://www.opentravel.org/OTA/2003/05"">...</Warnings>

    <PricedItineraries xmlns=""http://www.opentravel.org/OTA/2003/05"">

        <PricedItinerary SequenceNumber=""1"">

                <AirItinerary DirectionInd=""OneWay"">

                        <OriginDestinationOptions>

                                <OriginDestinationOption ElapsedTime=""1920"">

                                        <FlightSegment DepartureDateTime=""2017-03-21T21:45:00"" ArrivalDateTime=""2017-03-22T09:50:00"" StopQuantity=""0"" FlightNumber=""7336"" ResBookDesigCode=""T"" ElapsedTime=""425"">

                                                <DepartureAirport LocationCode=""CDL"" TerminalID=""1""/>

                                                <ArrivalAirport LocationCode=""CDA"" TerminalID=""1A""/>

                                                <OperatingAirline Code=""AA"" FlightNumber=""810""/>

                                                <Equipment AirEquipType=""000""/>

                                                <MarketingAirline Code=""PP""/>

                                                <DisclosureAirline Code=""AC""/>

                                                <MarriageGrp>O</MarriageGrp>

                                                <DepartureTimeZone GMTOffset=""-10""/>

                                                <ArrivalTimeZone GMTOffset=""11""/>

                                                <TPA_Extensions>

                                                        <eTicket Ind=""true""/>

                                                </TPA_Extensions>

                                        </FlightSegment>

                                </OriginDestinationOption>

                        </OriginDestinationOptions>

                </AirItinerary>

        </PricedItinerary>

</PricedItineraries>

</OTA_AirLowFareSearchRS>";

​

            XDocument xdoc = XDocument.Parse(xml);

​

            var selected = from x in xdoc.Descendants()

                           where x.NodeType == XmlNodeType.Element 

                                   && x.Name.LocalName == "FlightSegment"

                               select x;

​

            foreach (var sel in selected)

            {

                foreach (var attrib in sel.Attributes())

                {

                    Console.WriteLine( attrib.Name + " = " +  attrib.Value);

                }

            }

    }

}