XML creation and modification in Unity, examples of backpack items

using UnityEngine; using System.Collections; using System.Xml; public class XmlParse : MonoBehaviour {     //文件路径     private string filePath = string.Empty;     private string fileName="/BagConfig.xml";     void Start () {         filePath = Application.streamingAssetsPath + fileName;     // AddNode ();         AddNum (2000,50);     }     void AddNode(){         // Create a file factory for XML file parsing         XmlDocument doc = new XmlDocument ();         doc. Load(filePath);         //Find the root node         XmlNode rootNode = doc.SelectSingleNode ("Bag");