private void SerializeDataContractJsonClicked(object sender, RoutedEventArgs e)
{
IList <RootObject> list = new List <RootObject>();
list.Add(GetObject("Jan", "Munich"));
list.Add(GetObject("Peter", "Munster"));
list.Add(GetObject("Karl", "Köln"));
list.Add(GetObject("Hugo", "Paris"));
list.Add(GetObject("Luis", "London"));
var start = DateTime.Now;
var data = SerializationService.SerializeJson(list);
var end = DateTime.Now;
Output.Text = string.Format("{0} ticks ({1} sec)", end.Ticks - start.Ticks, (end - start).TotalSeconds);
}