private void button1_Click(object sender, EventArgs e)
{
//test web parser
var parser = new HtmlParser();
var blankHtmlDoc = new LayoutFarm.WebDom.Impl.HtmlDocument();
var snapSource = new TextSource(this.richTextBox1.Text.ToCharArray());
parser.Parse(snapSource, blankHtmlDoc, blankHtmlDoc.RootNode);
this.treeView2.Nodes.Clear();
var rootNode = new TreeNode("root");
DescibeNode(blankHtmlDoc.RootNode, rootNode);
treeView2.Nodes.Add(rootNode);
this.treeView2.ExpandAll();
}