I'm making a project to Windows Phone using Silverlight + XNA, but I don't know how I can use the DrawableGameComponent because the constructor requires a Game class, it looks like this:

Planet.cs

class Planet : DrawableGameComponent
{
    public Planet(Game game): base(game){
        
    {
}

but in my first page of Silverlight and XNA project not is a Game class it's this:

GamePage.xaml.cs

public partial class GamePage : PhoneApplicationPage
{
   ...
}
        

Where do I find the Game class to pass into the DrawableGameComponent constructor?