public string GetHtml()
{
string html = null;
if (this.ListType == ListStyles.Bullet)
html = "<ul>\n";
else if (this.ListType == ListStyles.Number)
html = "<ol>\n";
foreach(IContent content in this.Content)
if (content is IHtml)
html += ((IHtml)content).GetHtml();
if (this.ListType == ListStyles.Bullet)
html += "</ul>\n";
else if (this.ListType == ListStyles.Number)
html += "</ol>\n";
//html += "</ul>\n";
return html;
}