gistfile1.txt

        private static void AchievementContext_AchievementsUnlocked(object sender, AchievementEventArgs args)
        {
            if (args.UnlockedAchievements.Any())
            {
                Debug.WriteLine(string.Format("Achievements unlocked: {0}",
                    string.Join(", ", args.UnlockedAchievements.Select(a => "[" + a.Name + "]"))));

                Dispatcher.CurrentDispatcher.BeginInvoke(new Action(() => 
                {
                    AchievementNotificationBox.ShowAchievements(args.UnlockedAchievements);
                }));
            }
        }