Question

Does anyone know how to set a variable that can be accessed on all pages of a Windows Phone 7 App?

Answer 1

Without knowing any more specifics of your situation, you could create the variables as members of your App class:

  public partial class App : Application
  {
    ...
    public int foo { get; set; }
    ...
  }

Then access if from wherever:

  (App.Current as App).foo = 3;