How to foreach all containers using ApplicationDataContainer.Containers?

Question

Hi,

I am trying to use ApplicationDataContainer to store some JSON result from FB.

After I store it, I would like to enumerate it all using foreach no matter

//App.localSettings.Containers create and store some data
foreach (KeyValuePair<string, ApplicationDataContainer> container in App.localSettings.Containers)
{
   string id = container.Values["id"];
}

or

//App.localSettings.Containers create and store some data
foreach (dynamic container in App.localSettings.Containers)
{
   string id = container.Values["id"];
}

It always come out exception or compiling error, any suggestion to enum those container?

Thanks,

Evan Lin