Set a variable that can be accessed on all pages of a Windows Phone App

App.xaml.cs

public partial class App : Application {
 public string sName { get; set; }

 public static new App Current
 {
     get { return Application.Current as App; }
 }
  ...
  ...


} 

Page1.xaml.cs

public partial class Page1 : PhoneApplicationPage { 
 public string _sName;

 public Page1()
 {
    InitializeComponent();

    _sName = App.Current.sName;
 }

}