windows phone how can I create and keep each instance saved at startup as read-only? Possibly in compile-time

I'm writing an application that shows a set of pages, filled with some information.

Being the structure of the pages very similar from each other, I was thinking to create a single Page and a class, say InformationClass.cs:

class InformationClass {
  int id;
  string contentTitle;
  string contentText;
}

InformationClass could be a model for every page's content. In this way, I will instantiate different objects of this class, filled with different values for each page.

Now, assuming my reasoning is correct, how can I create and keep each instance saved at startup as read-only? Possibly in compile-time?

Should I write all the information into an unique XML or JSON file and then fill the pages from this source?

Thanks for your support

something like that

var list = new List<InformationClass>()
{
  new Information Class() { contentTitle = "title A", contentText "bla bla" },
  new Information Class() { contentTitle = "title B", contentText "bla bla" },
  new Information Class() { contentTitle = "title C", contentText "bla bla" },
 ...
}