The Persistence service in CAB

Seems nobody is writing down simple examples of how to use the CAB mechanisms, so here is a snippet that might be useful to somebody one day…
[csharp]
public IStatePersistenceService PersistenceService
{
get
{
return Services.Get();
}
}
…
if (PersistenceService.Contains(“SomeKey”))
Console.WriteLine(PersistenceService.Load(“SomeKey”)["a"].ToString());
else
{
State s = new State(“ab”);
s["a"] = ” Some string you want to persist, e.g. a favorite item.”;
s["b"] = new SomeObjectYouNeedToSave();

PersistenceService.Save(s);
}
[/csharp]