WPF Executor Loading Tab Issue

               InitializeComponent();

            ScriptHubGrid.Visibility = Visibility.Hidden;

            ThemeGrid.Visibility = Visibility.Hidden;

            SettingsGrid.Visibility = Visibility.Hidden;

            InfoGrid.Visibility = Visibility.Hidden;

private void Settings_Click(object sender, RoutedEventArgs e)

        {

            if (SettingsGrid.Visibility == Visibility.Hidden)

            {

                SettingsGrid.Visibility = Visibility.Visible;

            }

            else

            {

                SettingsGrid.Visibility = Visibility.Hidden;

            }

        }

        private void Info_Click(object sender, RoutedEventArgs e)

        {

            if (InfoGrid.Visibility == Visibility.Hidden)

            {

                InfoGrid.Visibility = Visibility.Visible;

            }

            else

            {

                InfoGrid.Visibility = Visibility.Hidden;

            }

        }

Anytime I try switching between tabs by pressing the button it takes like 20 seconds just to load each screen. Why is that?