/// <summary>
        /// Event handler for when an available session menu entry is selected.
        /// </summary>
        void AvailableSessionMenuEntrySelected(object sender, PlayerIndexEventArgs e)
        {
            // Which menu entry was selected?
            AvailableSessionMenuEntry menuEntry = (AvailableSessionMenuEntry)sender;
            AvailableNetworkSession availableSession = menuEntry.AvailableSession;

            try
            {
                // Begin an asynchronous join network session operation.
                IAsyncResult asyncResult = NetworkSession.BeginJoin(availableSession,
                                                                    null, null);

                // Activate the network busy screen, which will display
                // an animation until this operation has completed.
                NetworkBusyScreen busyScreen = new NetworkBusyScreen(asyncResult);

                busyScreen.OperationCompleted += JoinSessionOperationCompleted;

                ScreenManager.AddScreen(busyScreen, ControllingPlayer);
            }
            catch (Exception exception)
            {
                NetworkErrorScreen errorScreen = new NetworkErrorScreen(exception);

                ScreenManager.AddScreen(errorScreen, ControllingPlayer);
            }
        }
        /// <summary>
        /// Event handler for when the Create Session menu entry is selected.
        /// </summary>
        void CreateSessionMenuEntrySelected(object sender, PlayerIndexEventArgs e)
        {
            try
            {
                // Which local profiles should we include in this session?
                IEnumerable<SignedInGamer> localGamers =
                        NetworkSessionComponent.ChooseGamers(sessionType,
                                                             ControllingPlayer.Value);

                // Begin an asynchronous create network session operation.
                IAsyncResult asyncResult = NetworkSession.BeginCreate(
                                                    sessionType, localGamers,
                                                    NetworkSessionComponent.MaxGamers,
                                                    0, null, null, null);

                // Activate the network busy screen, which will display
                // an animation until this operation has completed.
                NetworkBusyScreen busyScreen = new NetworkBusyScreen(asyncResult);

                busyScreen.OperationCompleted += CreateSessionOperationCompleted;

                ScreenManager.AddScreen(busyScreen, ControllingPlayer);
            }
            catch (Exception exception)
            {
                NetworkErrorScreen errorScreen = new NetworkErrorScreen(exception);

                ScreenManager.AddScreen(errorScreen, ControllingPlayer);
            }
        }
        /// <summary>
        /// Event handler called when the system delivers an invite notification.
        /// This can occur when the user accepts an invite that was sent to them by
        /// a friend (pull mode), or if they choose the "Join Session In Progress"
        /// option in their friends screen (push mode). The handler leaves the
        /// current session (if any), then joins the session referred to by the
        /// invite. It is not necessary to prompt the user before doing this, as
        /// the Guide will already have taken care of the necessary confirmations
        /// before the invite was delivered to you.
        /// </summary>
        public static void InviteAccepted(ScreenManager screenManager,
                                          InviteAcceptedEventArgs e)
        {
            // If we are already in a network session, leave it now.
            NetworkSessionComponent self = FindSessionComponent(screenManager.Game);

            if (self != null)
                self.Dispose();

            try
            {
                // Which local profiles should we include in this session?
                IEnumerable<SignedInGamer> localGamers =
                    ChooseGamers(NetworkSessionType.PlayerMatch, e.Gamer.PlayerIndex);

                // Begin an asynchronous join-from-invite operation.
                IAsyncResult asyncResult = NetworkSession.BeginJoinInvited(localGamers,
                                                                           null, null);

                // Use the loading screen to replace whatever screens were previously
                // active. This will completely reset the screen state, regardless of
                // whether we were in the menus or playing a game when the invite was
                // delivered. When the loading screen finishes, it will activate the
                // network busy screen, which displays an animation as it waits for
                // the join operation to complete.
                NetworkBusyScreen busyScreen = new NetworkBusyScreen(asyncResult);

                busyScreen.OperationCompleted += JoinInvitedOperationCompleted;

                LoadingScreen.Load(screenManager, false, null, new BackgroundScreen(),
                                                               busyScreen);
            }
            catch (Exception exception)
            {
                NetworkErrorScreen errorScreen = new NetworkErrorScreen(exception);

                LoadingScreen.Load(screenManager, false, null, new BackgroundScreen(),
                                                               new MainMenuScreen(screenManager.Game as ParentGame),
                                                               errorScreen);
            }
        }