public MainWindow()
{
Application.Current.DispatcherUnhandledException += (_, e) => {
MaterialDesignThemes.Wpf.DialogHost.Show(e.Exception, "general_error_dialog_host");
e.Handled = true;
};
InitializeComponent();
OriginalTitle = Title;
Business = BusinessFactory.New();
AdminSession = new Session <Admin>(Business, AdminPage);
HostSession = new Session <Host>(Business, HostPage);
GuestSession = new Session <Guest>(Business, GuestPage);
AdminPage.Navigate(new AdminSignInPage(Business, AdminSession, AdminPage));
HostPage.Navigate(new HostSignInPage(Business, HostSession, HostPage));
GuestPage.Navigate(new GuestSignInPage(Business, GuestSession, GuestPage));
}