using System;

using System.Collections.Generic;

using System.IO;

using System.Xml.Serialization;

​

public class Program

{

    public static void Main(string[] args)

    {

        const string xml =

            @"<dform>

                  <label name='label-a' text='A' dbpath='module/label-a'/>

                  <textmemo name='textmemo-a' text='' dbpath='module/textmemo-a'/>

                  <section name='section-a' text='' dbpath='module/section-a'>

                      <textmemo name='textmemo-b' text='' dbpath='module/textmemo-b'/>

                  </section>

                  <section name='section-b' text='' dbpath='module/section-b'>

                      <textmemo name='textmemo-c' text='' dbpath='module/textmemo-c'/>

                      <label name='label-c' text='A' dbpath='module/label-c'/>

                      <section name='section-c' text='' dbpath='module/section-c'>

                          <label name='label-d' text='A' dbpath='module/label-d'/>

                      </section>

                  </section>

              </dform>";

​

        var serializer = new XmlSerializer(typeof(DForm));

​

        var dform = (DForm) serializer.Deserialize(new StringReader(xml));

​

        serializer.Serialize(Console.Out, dform);

    }

}

​

public abstract class Widget

{

    [XmlIgnore]

    public abstract string type { get;}

    [XmlAttribute]

    public string name { get; set; }

    [XmlIgnore]

    public string labelCation { get; set; }

    [XmlAttribute]

    public string text { get; set; }

    [XmlAttribute]

    public string dbpath { get; set; }

}

​

public class Textmemo : Widget

{

    public override string type { get; } = "CONTROL";

}

​

public class Label : Widget

{

    public override string type { get; } = "LABEL";

}

​

public class Section : Widget

{

    public override string type { get; } = "SECTION";

​

    [XmlElement("textmemo", Type=typeof(Textmemo))]

    [XmlElement("label", Type=typeof(Label))]

    [XmlElement("section", Type=typeof(Section))]

    public List<Widget> subsection { get; } = new List<Widget>();

}

​

[XmlRoot("dform")]

public class DForm

{

    [XmlElement("textmemo", Type=typeof(Textmemo))]

    [XmlElement("label", Type=typeof(Label))]

    [XmlElement("section", Type=typeof(Section))]

    public List<Widget> Widgets { get; } = new List<Widget>();

}