Как передать переменную на другую страницу WPF?

private void pre1_Click(object sender, RoutedEventArgs e)
        {
            this.Content = new Page2("переменная");
        }

private void pre1_Click(object sender, RoutedEventArgs e)
        {
            var page = new Page2();
            page.Variable = "переменная";
            this.Content = page;
        }

private void pre1_Click(object sender, RoutedEventArgs e)
        {
            _service.Variable = "переменная";
            this.Content = new Page2();
        }

var service = _container.Resolve<IMyService>;
        Title = service.Variable;