How to properly show Android AlertDialog from any class?

Android
1

In my game, the GameOver page allows users to submit their scores to the server.

I want to show an alert dialog if the submission is successful or not. Since the GameOver page belongs in a PCL in a separate project and does not inherit the GameActivity, what is the proper way to get the application Context and show the alert dialog from the GameOver
page?

UPDATE:

What I’ve done so far is to pass the GameActivity Context as parameter to any class that needs it

private Context context;
....
protected override void OnCreate(Bundle bundle)
{
        base.OnCreate(bundle);
        Game game = new SpaceShooterX.Game1 ();
        SetContentView ((View)game.Services.GetService (typeof(View)));
        game.Run();
        context = this;
        MessageBoxHelper messageBoxHelper = new MessageBoxHelper (context);
        SpaceX.MessageBoxHelper.IMsgBoxHelper = messageBoxHelper;
}

The alertdialog was not shown. No error message. I placed a break point to confirm alert.Show() was called.

 public void ShowOK()
        {   

            AlertDialog.Builder alert = new AlertDialog.Builder (context);
            alert.SetTitle ("Hi, how are you");
            alert.SetPositiveButton ("Good", (senderAlert, args) => {
            } );

            alert.SetNegativeButton ("Not doing great", (senderAlert, args) => {    
            } );

            alert.Show();    
        }

What am I doing wrong?

2

Never mind. It was the logic in the my UpdateScreen(GameTime gameTime) method that was causing the problem.