listview中的webbrowser URL

Question

我在c＃webbrowser中有收藏夹，我尝试在表单关闭时更改URL 我的代码：

    private void Favorites_FormClosing(object sender, FormClosingEventArgs e)
    {
        System.Xml.XmlTextWriter writer = new System.Xml.XmlTextWriter(Application.StartupPath + "\\Favorites.xml", null);

        writer.WriteStartElement("Favorites");
        for (int i = 0; i < listView1.Items.Count; i++)
        {
            writer.WriteStartElement("Item");
            writer.WriteAttributeString("url", listView1.Items[i].Text);
            writer.WriteEndElement();
        }
        writer.WriteEndElement();
        writer.Close();
    }

如何在表格关闭时更改网址？