Silverlight App object Does not exist' Error

Question

name 'App' does not exist in the current context.

How that possible? Have to note my initialization code is different than MainPage() type, as I converted SketchFlow app into production Silverlight. They instruct you to do init code via System.Windows.Controls.Frame():

private void Application_Startup(object sender, StartupEventArgs e)
{
    this.RootVisual = new System.Windows.Controls.Frame() { Source = new Uri("/MyAppScreen.xaml", UriKind.Relative) };

}
public static string ValueFromHome =
"A Value on Home page"; 

the goal was to set up public var inside App object so I can access it from various screens down the road

---

Accessing Resource data requires calling App object I believe as in below, is that correct? so this won't help me

string color = App.Current.Resources["customColor"].ToString(); 

Answer 1

If you are just storing strings, look into using Resource files. Then they can be translated if that ever becomes necessary. EDIT (to explain the resource file usage): To access the resource, first create a .resx file in your project (let's say you name it MainResource.resx), change the access modifier drop down to public, add your string with Name: ValueFromHome and Value: "A Value on Home page". Then you can get the value by adding a using to the namespace of the resource if needed and calling it directly like so:

string value = MainResource.ValueFromHome;

I'd be wary of static variables hanging around. Maybe you could use a MainViewModel to store that value. If you really need a static variable create a new static class in your project and put your ValueFromHome property in that class. The App probably isn't available since it is a Silverlight construct and not made to be available to all areas.