Convert Excel to XML

private void button2_Click(object sender, EventArgs e)

{

         OpenFileDialog();openKeywordsFileDialog.InitialDirectory =          Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

         openKeywordsFileDialog.Multiselect = false;

         openKeywordsFileDialog.ValidateNames = true;

         openKeywordsFileDialog.DereferenceLinks = false; // Will return .lnk in shortcuts.

         openKeywordsFileDialog.Filter = "Excel |*.xlsx";

         openKeywordsFileDialog.FileOk += new          System.ComponentModel.CancelEventHandler(OpenKeywordsFileDialog_FileOk);

         var dialogResult = openKeywordsFileDialog.ShowDialog();

      

}

public void OpenKeywordsFileDialog_FileOk(object sender, System.ComponentModel. CancelEventArgs e)

{

         OpenFileDialog fileDialog = sender as OpenFileDialog;

         string selectedFile = fileDialog.FileName;

         Properties.Settings.Default.Save();

         textBox1.Text = selectedFile;

         if (string.IsNullOrEmpty(selectedFile) || selectedFile.Contains(".lnk"))

         {

               MessageBox.Show("Please select a valid Excel File");

               e.Cancel = true;

         }

         return;

}

private void ConvertExcel_XML(object sender, EventArgs e)

{

 ////// ???? code 

}