public DialogService()
{
_container = new DialogHost();
_container.Closing += (s, e) =>
{
e.Cancel = true;
if (_container._container.Children.Count > 0)
{
var fe = _container._container.Children?[0] as FrameworkElement;
var vm = fe?.DataContext as PageBase;
vm?.DoCleanup();
_container.Hide();
}
};
_dialogs = new Dictionary <string, Type>();
}