擴充套件性標識語言
Extensible Markup Language
標籤可以自定義
用於資料資訊的描述，它是被設計用來傳輸和儲存資料。XML被設計用來結構化、儲存以及傳輸資訊。

XML格式化工具
http://web.chacuo.net/formatxml
XML程式設計相關的類、方法、屬性
XMLDocument
CreateElement() //建立一個元素
AppendChild() //往節點下追加節點
Save() //儲存xml檔案
XMLDeclaration
CreateXmlDeclaration() //建立xml的宣告節點
XML程式設計相關的類、方法、屬性

using UnityEngine;
using System.Collections;
using System.Xml;

public class XMLOperate : MonoBehaviour
{
    string xmlSavePath = null
 
;

    void Awake()
    {
        xmlSavePath = Application.dataPath + "/Resources/Persons.xml";
    }

    /// <summary>
    /// 向一個節點新增person節點
    /// </summary>
    /// <param name="doc"></param>
    /// <param name="parent"></param>
    /// <param name="person"></param>
    void
 
 Add(XmlDocument doc, XmlElement parent, Person person)
    {
        XmlElement e = doc.CreateElement("Person");
        e.SetAttribute("id", person.ID.ToString());
        e.SetAttribute("gender", person.Gender);
        e.InnerText = person.Name;
        parent.AppendChild(e);
    }

    void Start()
    {
        #region 一、XML建立以及新增節點
        //*
        XmlDocument doc = new XmlDocument();
        XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
        doc.AppendChild(dec);
        //根節點 
        XmlElement root = doc.CreateElement("Persons");
        doc.AppendChild(root);

        var persons = new Person[] { new Person() { ID = 1, Name = "Aladdin", Gender = "男" }, new Person() { ID = 2, Name = "Rose", Gender = "女" } };

        foreach (var p in persons)
        {
            this.Add(doc, root, p);
        }

        doc.Save(xmlSavePath);
        Debug.Log("檔案建立成功！");
        //*/
        #endregion

        #region 二、XML刪除節點
        /*
        XmlDocument doc = new XmlDocument();
        doc.Load(xmlSavePath);    //載入Xml檔案 
        XmlElement root = doc.DocumentElement;   //獲取根節點 Persons節點
        XmlNodeList personNodes = root.GetElementsByTagName("Person"); //獲取Person子節點集合 
        XmlNode selectNode = root.SelectSingleNode("/Persons/Person[@id='1']"); //返回匹配的第一個節點
        if (selectNode != null)
            root.RemoveChild(selectNode);
        Debug.Log("節點刪除成功");
        doc.Save(xmlSavePath);
        */
        #endregion

        #region 三、XML節點查詢和修改
        /*
        XmlDocument doc = new XmlDocument();
        doc.Load(xmlSavePath);
        XmlElement root = doc.DocumentElement;
        XmlNodeList personNodes = root.GetElementsByTagName("Person");
        foreach (XmlNode node in personNodes)
        {
            XmlElement ele = (XmlElement)node;
            if (ele.GetAttribute("id") == "2")
            {
                ele.InnerText = "James";
            }
        }
        Debug.Log("節點查詢修改成功");
        doc.Save(xmlSavePath);
        */
        #endregion
    }

}

using UnityEngine;
using System.Collections;

public class Person
{
    public int ID{ get; set; }
    public string Gender { get; set; }
    public string Name { get; set; }
}