using System;

using ChoETL;

using System.Linq;

using System.Collections;

​

public class Program

{

    public static void Main()

    {

        string xml = @"<AdapterCards>

    <cards type=""MCS"">

        <card>

            <id>id1</id>

            <description>desc1</description>

            <mccode>code1</mccode>

        </card>

        <card>

            <id>id2</id>

            <description>desc2</description>

            <mccode>code2</mccode>

        </card>

    </cards>

    <cards type=""MCM"">

        <card>

            <id>id3</id>

            <description>desc3</description>

            <mccode>code3</mccode>

        </card>

        <card>

            <id>id4</id>

            <description>desc4</description>

            <mccode>code4</mccode>

        </card>

    </cards>

    <cards type=""F""/>

    <cards type=""B""/>

</AdapterCards>";

        using (var r = ChoXmlReader.LoadText(xml)

               .WithXPath("//cards")

               )

        {

            using (var w = new ChoJSONWriter(Console.Out)

                  )

                w.Write(r.SelectMany(r1 => ((dynamic[])r1.cards??new dynamic[]{}).Select(c => new { r1.type, c.id, c.description, c.mccode })));

        }

    }

}