using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Stylet.Samples.NavigationController.Pages { public class HeaderViewModel : Screen { private readonly INavigationController navigationController; public HeaderViewModel(INavigationController navigationController) { this.navigationController = navigationController ?? throw new ArgumentNullException(nameof(navigationController)); } public void NavigateToPage1() => this.navigationController.NavigateToPage1(); public void NavigateToPage2() => this.navigationController.NavigateToPage2("the Header"); } }