将textbox1条目保存为xml

下面是我的代码:

 static void main(string[] args)
    {
        XmlDocument xmldoc = new XmlDocument();
        xmldoc.Load("data.XML");
        XmlNodeList userNodes = xmldoc.SelectNodes("data.XML");
        foreach (XmlNode userNode in userNodes) ;
    }
    private string id;
    private string APIkey;
    private string VCode;
    public string ID
    {
         get { return id; }
         set { id = Guid.NewGuid().ToString(); }
    }
    public string APIKEY
    {
        get { return APIkey; }
        set { APIkey = value; }
    }
    public string VCODE
    {
        get { return VCode; }
        set { VCode = value; }
    }
    public static void SaveData(object obj, string Filename)
    {
        XmlSerializer sr = new XmlSerializer(obj.GetType());
        TextWriter writer = new StreamWriter(Filename, true);
        sr.Serialize(writer, obj);
        writer.Close();
    }
}

这是我的按钮;

    private void button1_Click(object sender, EventArgs e)
   {
    {
       try
    {

        APISAVE info = new APISAVE();
        info.APIKEY = txtAPI.Text;
        info.VCODE = txtVerC.Text;
        info.ID = info.ID;
        APISAVE.SaveData(info, "data.XML");
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

ok，我想做的是添加我在文本框中键入的内容以进入XML文件，但是当我再次这样做时，它会将其添加到XML而不是覆盖它。

我已经在谷歌上搜索了一段时间，读了很多东西，只是没有任何意义，我试过了。我现在请求一个善良的灵魂，请用婴儿的语言向我解释，这一切都是错的。

XML输出;

<?xml version="1.0" encoding="utf-8"?>
<Serialization xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<ID>91bb44be-d55e-40f6-83f7-8fb43d0a7321</ID>
<APIKEY>12</APIKEY>
<VCODE>12</VCODE>
</Serialization><?xml version="1.0" encoding="utf-8"?>
<Serialization xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<ID>c2a45a36-e7c8-4ac5-a37c-87c452db5807</ID>
<APIKEY>123</APIKEY>
<VCODE>123</VCODE>
 </Serialization>

另一个编辑:

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Xml;
using System.Xml.Linq;
using System.Xml.Serialization;
using No_IdeaV2.API_Key_Window;
using System.IO;
namespace No_IdeaV2.API_Key_Window
{
public partial class UCAPIn : Form
{        
    public UCAPIn()
    {
        InitializeComponent();
    }
    private void label1_Click(object sender, EventArgs e)
    {
    }
    private void menuStrip1_ItemClicked(object sender,  ToolStripItemClickedEventArgs e)
    {
    }
    private void whatAmIDoingToolStripMenuItem_Click(object sender, EventArgs e)
    {
    }
    private void textBox1_TextChanged(object sender, EventArgs e)
    {
    }
    public List<Serialization> list = null;
    private void UCAPIn_Load(object sender, EventArgs e)
    {
        list = new List<Serialization>();
        var doc = XDocument.Load("data.XML");
        foreach (XElement element in doc.Descendants("Serialization"))
        {
            list.Add(new Serialization()
            { ID = element.Element("ID").Value, APIKEY = element.Element("APIKEY").Value, VCODE = element.Element("VCODE").Value });
        }
    }
    public void button1_Click(object sender, EventArgs e)
    {
        {
            try
            {
                Serialization info = new Serialization();
                info.APIKEY = txtAPI.Text;
                info.VCODE = txtVerC.Text;
                info.ID = Guid.NewGuid().ToString();
                list.Add(info);
                Serialization.SaveData(list, "data.XML");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
    private void button2_Click(object sender, EventArgs e)
    {
        this.Close();
    }
    private void whatIsThisToolStripMenuItem_Click(object sender, EventArgs e)
    {
    }


        public class Serialization
    {
        private string id;
        private string APIkey;
        private string VCode;
        public string ID
        {
            get { return id; }
            set { id = value; }
        }
        public string APIKEY
        {
            get { return APIkey; }
            set { APIkey = value; }
        }
        public string VCODE
        {
            get { return VCode; }
            set { VCode = value; }
        }
        public static void SaveData(List<Serialization> list, string      Filename)
        {
            XmlSerializer sr = new XmlSerializer(list.GetType());
            TextWriter writer = new StreamWriter(Filename, true);
            sr.Serialize(writer, list);
            writer.Close();
        }
    }
}

}