Из парсера xml в парсер html

Здрасте всем!
Написал парсер Xml, теперь вот хочу сделать по его подобию парсер html страниц. чтобы страницу ввел и отпарсило. Да только вот туго у меня с этим =(

Code:

        private XmlDocument mDocument;
        private XmlNode mCurrentNode;
        public Form1()
        {
            InitializeComponent();
            mDocument = new XmlDocument();
            mDocument.Load(@"путь к файлу");
            mCurrentNode = mDocument.DocumentElement;
            ClearListBox();
        }
        private void DisplayList(XmlNodeList nodeList)
        {
            foreach (XmlNode node in nodeList)
            {
                RecurseXmlDocumentNoSiblings(node, 0);
            }
        }
        private void RecurseXmlDocumentNoSiblings(XmlNode root, int indent)
        {
            //ничего не делать, если root равен null
            if (root == null)
                return;
            if (root is XmlElement) 
            {
                
                listBoxResult.Items.Add(root.Name.PadLeft(root.Name.Length + indent));
                
                if (root.HasChildNodes)
                    RecurseXmlDocument(root.FirstChild, indent + 2);
            }
            else if (root is XmlText)
            {

                string text = ((XmlText)root).Value;
                listBoxResult.Items.Add(text.PadLeft(text.Length + indent));
            }
            else if (root is XmlComment)
            {

                string text = root.Value;
                listBoxResult.Items.Add(text.PadLeft(text.Length + indent));
         
                if (root.HasChildNodes)
                    RecurseXmlDocument(root.FirstChild, indent + 2);
            }
        }
        private void RecurseXmlDocument(XmlNode root, int indent)
        {
            if (root == null)
                return;
            if (root is XmlElement) 
            {
                listBoxResult.Items.Add(root.Name.PadLeft(root.Name.Length + indent));
               
                if (root.HasChildNodes)
                    RecurseXmlDocument(root.FirstChild, indent + 2);

                if (root.NextSibling != null)
                    RecurseXmlDocument(root.NextSibling, indent);
            }
            else if (root is XmlText)
            {
                string text = ((XmlText)root).Value;
                listBoxResult.Items.Add(text.PadLeft(text.Length + indent));
            }

            else if (root is XmlComment)
            {
                string text = root.Value;
                listBoxResult.Items.Add(text.PadLeft(text.Length + indent));
               
                if (root.HasChildNodes)
                    RecurseXmlDocument(root.FirstChild, indent + 2);
                
                if (root.NextSibling != null)
                    RecurseXmlDocument(root.NextSibling, indent);
            }
        }
        private void ClearListBox()
        {
            listBoxResult.Items.Clear();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            mCurrentNode = mDocument.DocumentElement.SelectSingleNode("//books");
            ClearListBox();
            RecurseXmlDocument(mCurrentNode, 0);
        }

        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                XmlNodeList nodeList = mCurrentNode.SelectNodes("//book/author");
                ClearListBox();
                DisplayList(nodeList);
            }
            else
                ClearListBox();
        }

        private void radioButton3_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                XmlNodeList nodeList = mCurrentNode.SelectNodes("//book[author='Jacob Hammer Pedersen']");
                ClearListBox();
                DisplayList(nodeList);
            }
            else
                ClearListBox();
        }

        private void radioButton4_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                XmlNodeList nodeList = mCurrentNode.SelectNodes("//item");
                ClearListBox();
                DisplayList(nodeList);
            }
            else
                ClearListBox();
        }

        private void radioButton5_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                mCurrentNode = mCurrentNode.SelectSingleNode("book[title='Beginnig Visual C#']");
                ClearListBox();
                RecurseXmlDocumentNoSiblings(mCurrentNode, 0);
            }
            else
                ClearListBox();
        }

        private void radioButton6_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                mCurrentNode = mCurrentNode.SelectSingleNode("//books");
                ClearListBox();
                RecurseXmlDocumentNoSiblings(mCurrentNode, 0);
            }
            else
                ClearListBox();
        }

        private void radioButton7_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                XmlNodeList nodeList = mCurrentNode.SelectNodes("*");
                ClearListBox();
                DisplayList(nodeList);
            }
            else
                ClearListBox();
        }

        private void radioButton8_CheckedChanged(object sender, EventArgs e)
        {
            if (mCurrentNode != null)
            {
                mCurrentNode = mCurrentNode.SelectSingleNode("book[@pages='1000']");
                ClearListBox();
                RecurseXmlDocumentNoSiblings(mCurrentNode, 0);
            }
            else
                ClearListBox();
        }
        


        private void button2_Click(object sender, EventArgs e)
        {
            if (textBoxQuery.Text == "")
                return;
            try
            {
                XmlNodeList nodeList = mCurrentNode.SelectNodes(textBoxQuery.Text);
                ClearListBox();
                DisplayList(nodeList);
            }
            catch (System.Exception err)
            {
                MessageBox.Show(err.Message);
            }

        }


    }
}

Помогите плиз преобразовать парсер xml в парсер html...