public void Run()
{
    Logger.ClearAll();
    Logger.Log(Xml2Json("<person><name>Mike</name><age>30</age></person>"));
    Logger.Log(Json2Xml("{'person':{'name':'Mike', 'age':30}}"));
}

public string Xml2Json(string xml)
{
    lock(this)
    {
        Default.Navigate("http://www.utilities-online.info/xmltojson");
        Default.Ready();
        Default.SelectSingleNode("#xml").Text(xml);
        Default.SelectSingleNode("#tojson").Click();
        var json = Default.SelectSingleNode("#json").Text();
        return json;
    }
}

public string Json2Xml(string json)
{
    lock(this)
    {
        Default.Navigate("http://www.utilities-online.info/xmltojson");
        Default.Ready();
        Default.SelectSingleNode("#json").Text(json);
        Default.SelectSingleNode("#toxml").Click();
        var xml = Default.SelectSingleNode("#xml").Text();
        return xml;
    }
}