using System;

​

using System.Linq;

using System.Xml.Linq;

​

public class Program

{

    public static void Main(string[] args)

    {

        const string xml = @"<ParentNode>

    <Items>

        <Request>

            <IsValid>True</IsValid>

            <ItemLookupRequest>

            <Item>

                <ASIN>B001MS70F1</ASIN>

                <OfferSummary>

                        <LowestNewPrice>

                            <Amount>1098</Amount>

                            <CurrencyCode>GBP</CurrencyCode>

                            <FormattedPrice>£15.98</FormattedPrice>

                        </LowestNewPrice>

                </OfferSummary>

            </Item>

            </ItemLookupRequest>

        </Request>

    </Items>

    <Items>

        <Request>

            <IsValid>True</IsValid>

            <ItemLookupRequest>

                <Item>

                    <ASIN>B001MS70212</ASIN>

                    <OfferSummary>

                            <LowestNewPrice>

                                <Amount>1098</Amount>

                                <CurrencyCode>GBP</CurrencyCode>

                                <FormattedPrice>£10.98</FormattedPrice>

                            </LowestNewPrice>

                    </OfferSummary>

                </Item>

            </ItemLookupRequest>

        </Request>

    </Items>

</ParentNode>";

​

        var doc = XDocument.Parse(xml);

​

        var prices = from item in doc.Descendants("Item")

                     from summary in item.Elements("OfferSummary")

                     from lowestNewPrice in summary.Elements("LowestNewPrice")

                     select new

                     {

                         ASIN = (string) item.Element("ASIN"),

                         FormattedPrice = (string) lowestNewPrice.Element("FormattedPrice")

                     };

​

​

        foreach (var price in prices)

        {

            Console.WriteLine($"ASIN: {price.ASIN} Price: {price.FormattedPrice}");

        }

    }

}