Data bind from network based XML file to class C#

Hello.

I am trying to move my internal list to a network based XML file.

As i have tryed defrend things now i am stock at this code in my application:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
using System.IO;
using System.Management;
using System.Xml.Linq;


namespace HQ_Installer
{
    public partial class Form1 : Form
    {

        public Form1()
        {

            InitializeComponent();

            #region ComboBox1 indhold

            Office OfficeList = new Office();
            OfficeList.ReadXml(@"\\HQ\Software\att.xml");
            //comboBox1.DataSource = OfficeList;
            comboBox1.DisplayMember = "Program";
            comboBox1.ValueMember = "sti";
            comboBox1.ValueMember = "side";
            OfficeList.Tables[0].DefaultView.Sort = "Program";
            comboBox1.DataSource = OfficeList.Tables[0];

            //var OfficeList = new[] {
            //new Office {Program = "Office 2007", sti = @"\\HQ\Software\Microsoft\Office\12\x86\Suits\setup.exe", side = "http://www.google.com"},
            //new Office {Program = "Office 2010", sti = @"\\HQ\Software\Microsoft\Office\14\x86\Suits\setup.exe", side = "http://www.microsoft.com"}

            //};
            //comboBox1.DataSource = OfficeList;
            //comboBox1.DisplayMember = "Program";

            #endregion

            #region Start og slut af splash screen del 1
            Thread t = new Thread(new ThreadStart(Startform));
            t.Start();
            Thread.Sleep(5000);
            t.Abort();
            #endregion

            #region Tab navne
            //Tab side navne
            tabPage1.Text = "Start";
            tabPage2.Text = "Microsoft Office";
            tabPage3.Text = "Microsoft Windows";
            tabPage4.Text = "Microsoft Windows Server";
            tabPage5.Text = "Opdate";
            #endregion

        }

        #region Start og slut af splash screen del 2
        public void Startform()
        {
            Application.Run(new splash_screen());
        }
        #endregion

        private void Form1_Load(object sender, EventArgs e)
        {

            //CPU clock speed
            ManagementObject CPU_speed = new ManagementObject("Win32_Processor.DeviceID='CPU0'");
            uint speed = (uint)(CPU_speed["MaxClockSpeed"]);
            CPU_speed.Dispose();
            label6.Text = speed + " MHz".ToString();

            string Query = "SELECT MaxCapacity FROM Win32_PhysicalMemoryArray";
            ManagementObjectSearcher searcher = new ManagementObjectSearcher(Query);
            foreach (ManagementObject WniPART in searcher.Get())
            {
                UInt32 SizeinKB = Convert.ToUInt32(WniPART.Properties["MaxCapacity"].Value);
                UInt32 SizeinMB = SizeinKB / 1024;
                UInt32 SizeinGB = SizeinMB / 1024;
                label8.Text = (SizeinGB + " GB");
            }
            #region Progress bar del 1
            // Start the BackgroundWorker.
            backgroundWorker1.RunWorkerAsync();
            #endregion

            #region Forbindelses til HQ server test
            if (Directory.Exists(@"\\HQ\Software"))
            {

            }
            else
            {
                MessageBox.Show("Der kan ikke oprettes forbindelse til \r\nSoftware mappen på HQ server.\r\n\r\nLøs problemet og prøv igen.","Test af forbindelse til HQ Server.",
                MessageBoxButtons.OK,
                //MessageBoxIcon.Warning // for Warning
                MessageBoxIcon.Error // for Error
                //MessageBoxIcon.Information  // for Information
                //MessageBoxIcon.Question // for Question
                );
                Application.Exit();

            }
            #endregion

            #region Skal flyttes på senere
            //Åbning af fil til tekst på start siden.
            richTextBox1.Text = File.ReadAllText(@"\\HQ\Software\Start fil.txt", System.Text.Encoding.UTF7);

            //Åbning af "web side" i web browser.
            //this.webBrowser1.Navigate("http://www.microsoft.com");

        }

        #endregion

        #region Progress bar Del 2
        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            for (int i = 1; i <= 100; i++)
            {
                // Wait 100 milliseconds.
                Thread.Sleep(100);
                // Report progress.
                backgroundWorker1.ReportProgress(i);
            }
        }

        private void backgroundWorker1_ProgressChanged(object sender,
            ProgressChangedEventArgs e)
        {
            // Change the value of the ProgressBar to the BackgroundWorker progress.
            toolStripProgressBar1.Value = e.ProgressPercentage;
            // Set the text.
            this.Text = e.ProgressPercentage.ToString();
        }
        #endregion

        #region Menu strip
        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AboutBox1 box = new AboutBox1();
            box.ShowDialog();
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        #endregion

        //private void Load_comboBox1()
        //{
            //DataSet ds = new DataSet();
            //DataTable dt = new DataTable("Office");
            //ds.Tables.Add(dt);
            //dt.Columns.Add("Program");
            //dt.Columns.Add("sti");
            //dt.Columns.Add("side");
            //foreach (DataColumn dc in dt.Columns)
            //{
                //dc.ColumnMapping = MappingType.Attribute;
            //}
            //FileStream myFileStream = new FileStream("C:\\att.xml", FileMode.Open, FileAccess.Read);
            //StreamReader myXmlStream = new StreamReader(myFileStream);
            //ds.ReadXml(myXmlStream);
            //myFileStream.Close();
            //comboBox1.DataSource = ds.Tables[0];
            //comboBox1.DataBind();
        //}

        #region Microsoft Office tab

        //Ændring af info i webBrowser1.
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            Office c = comboBox1.SelectedItem as Office;
            if (c != null)
            {
                string url = c.side;
                webBrowser1.Navigate(url);
            }

        }

        //Åbning af software installer.
        private void button1_Click(object sender, EventArgs e)
        {
            Office c = comboBox1.SelectedItem as Office;
            if (c != null)
            {
                string url = c.sti;
                Process.Start(url);
            }

        }
        #endregion

        #region Microsoft Windows tab



        #endregion

        #region Microsoft Windows Server tab



        #endregion

        #region Update tab


        #endregion
    }

}

And this is my Office Class there are binds to and from:

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

namespace HQ_Installer
{
    class Office
    {
        public string Program { get; set; }
        public string sti { get; set; }
        public string side { get; set; }

        public XmlReadMode ReadXml(Stream stream);
    }
}

And this is my XML file i am trying to open

<?xml version="1.0" encoding="UTF-8"?><OfficeList><Field side="http://www.google.com" sti="\\HQ\Software\Microsoft\Office\12\x86\Suits\setup.exe" Program="Office 2007"/></OfficeList>

The only thing there are working is the bind to comboBox1.
The rest of the binding to my Office Class does not work at all.

Is there a way to fix that in my codes?