How to make the same structure in XML?

Question

C++ / C#

Interested in how to write these fields from the code? when I try to just make a class, then all the fields are written inside, but how to add the fields like this, as in the picture, so that they are placed in the class name (like techtree version = "5"? Maybe these are attributes or what?

Answer 1

using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

namespace XmlSerializeDemo
{
    [XmlRoot("TechTree")]
    public class TechCollection
    {
        [XmlAttribute("version")]
        public int Version { get; set; }

        [XmlElement("Tech")]
        public TechItem Item { get; set; }
    }

    public class TechItem
    {
        [XmlAttribute("type")]
        public string Type { get; set; }

        [XmlAttribute("name")]
        public string Name { get; set; }
    }

    internal class Program
    {
        private static void Main(string[] args)
        {
            var e = new TechItem() { Type = "Noraml", Name = "Age 1" };
            var t = new TechCollection() { Version = 5, Item = e };

            Serialize(@".\demo.xml", t);
        }

        private static void Serialize<T>(string path, T obj)
        {
            XmlSerializer serializer = new XmlSerializer(obj.GetType());
            XmlWriterSettings settings = new XmlWriterSettings();
            settings.ConformanceLevel = ConformanceLevel.Document;
            settings.OmitXmlDeclaration = false; // не подавлять xml заголовок
            settings.Encoding = Encoding.UTF8; // кодировка
            settings.Indent = true; // добавлять отступы
            settings.IndentChars = "    "; // сиволы отступа

            // подавляем неймспейсы
            XmlSerializerNamespaces dummyNSs = new XmlSerializerNamespaces();
            dummyNSs.Add(string.Empty, string.Empty);

            using (FileStream fileStream = new FileStream(path, FileMode.Create))
            {
                using (XmlWriter xw = XmlWriter.Create(fileStream, settings))
                {
                    serializer.Serialize(xw, obj, dummyNSs);
                }
            }
        }
    }
}

at the exit

<?xml version="1.0" encoding="utf-8"?>
<TechTree version="5">
    <Tech type="Noraml" name="Age 1" />
</TechTree>

Answer 2

Write as attributes:
XML attributes