How do I fix this - C# winform save&load textboxvalues

See more:

C#

Visual-Studio

sorry with my english..
i made a button to save textboxes values into xml file.
i made a button to load from xml to each texboxes that saved before

My problem is when i press the loadbutton once yes it loads all the values i saved in xml to each textboxs but after that, i wanted to change some values in one of all textboxs and click the save button again and it pops up window says

"The process cannot access the file 'data.xml' because it is being used by another process."

so i cant modify the data after load..
please can i get solution to make it work! thanks

What I have tried:

Savebutton

private void btnsave_Click_1(object sender, EventArgs e)
        {
           
                    try
                    {
                        Information info = new Information();
                        info.Data1 = txtBasoSU.Text;
                        info.Data2 = txtBasoC.Text;
                        info.Data3 = txtBasoM.Text;
                        info.Data4 = txtBasoB.Text;
                        info.Data5 = txtMieA.Text;
                        info.Data6 = txtMieAB.Text;
                        info.Data7 = txtServisMinuman.Text;
                        info.Data8 = txtServisMakanan.Text;
                        info.Data9 = txtServisBungkus.Text;
                        info.Data10 = txtTotalSpajak.Text;
                        info.Data11 = txtTotalPajak.Text;
                        info.Data12 = txtTotal.Text;

                        SaveXML.SaveData(info, "data.xml");

                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                }

Loadbutton

private void btnload_Click(object sender, EventArgs e)
        {
            if (File.Exists("data.xml"))
            {
                XmlSerializer xs = new XmlSerializer(typeof(Information));
                FileStream read = new FileStream("data.xml", FileMode.Open, FileAccess.Read, FileShare.Read);
                Information info = (Information)xs.Deserialize(read);

                txtBasoSU.Text = info.Data1;
                txtBasoC.Text = info.Data2;
                txtBasoM.Text = info.Data3;
                txtBasoB.Text = info.Data4;
                txtMieA.Text = info.Data5;
                txtMieAB.Text = info.Data6;

                txtServisMinuman.Text = info.Data7;
                txtServisMakanan.Text = info.Data8;
                txtServisBungkus.Text = info.Data9;
                txtTotalSpajak.Text = info.Data10;
                txtTotalPajak.Text = info.Data11;
                txtTotal.Text = info.Data12;
            }
        }

SaveXML.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.IO;

namespace CS_Sistem_Managemen_Restoran
{
    public class SaveXML
    {
        public static void SaveData(object obj, string filename)
        {
            XmlSerializer sr = new XmlSerializer(obj.GetType());
            TextWriter writer = new StreamWriter(filename);
            sr.Serialize(writer, obj);
            writer.Close();
        }
    }
}

Information.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace CS_Sistem_Managemen_Restoran
{
    public class Information
    {
        private string data1;
        private string data2;
        private string data3;
        private string data4;
        private string data5;
        private string data6;

        private string data7;
        private string data8;
        private string data9;
        private string data10;
        private string data11;
        private string data12;
        
        
        public string Data1
        {
            get { return data1; }
            set { data1 = value; }
        }

        public string Data2
        {
            get { return data2; }
            set { data2 = value; }
        }
        public string Data3
        {
            get { return data3; }
            set { data3 = value; }
        }

        public string Data4
        {
            get { return data4; }
            set { data4 = value; }
        }

        public string Data5
        {
            get { return data5; }
            set { data5 = value; }
        }

        public string Data6
        {
            get { return data6; }
            set { data6 = value; }
        }

        public string Data7
        {
            get { return data7; }
            set { data7 = value; }
        }

        public string Data8
        {
            get { return data8; }
            set { data8 = value; }
        }

        public string Data9
        {
            get { return data9; }
            set { data9 = value; }
        }

        public string Data10
        {
            get { return data10; }
            set { data10 = value; }
        }

        public string Data11
        {
            get { return data11; }
            set { data11 = value; }
        }

        public string Data12
        {
            get { return data12; }
            set { data12 = value; }
        }

        
    }
}