OnWindowRestored()

protected override void OnWindowRestored(Window window, XElement element)
{
   Print("OnWindowRestored for " + window.GetHashCode());
   // locate the worksapces "SampleAddOn" elemenet which was created and saved earlier using the OnWindowSaved() method
   XElement sampleAddOnElement = element.Element("SampleAddOn");
   // do not do anything if that element does not exist
   if (sampleAddOnElement == null)
     return;
   // loop through all the contents of the "SampleAddOn" element
   foreach (XElement content in sampleAddOnElement.Elements())
   {
       // find the "ButtonState" content, restore it's value and set that as our tracked buttonState
       if (content.Name == "ButtonState")
       {
           bool buttonState = false;
           bool.TryParse(content.Value, out buttonState);
             continue;
       }
       //Parse additional elements here
   }
   //Don't forget to call the base OnWindowRestored method after you're done.
   base.OnWindowRestored(window, element);