Stylet/Samples/Stylet.Samples.NavigationController/Pages/ShellViewModel.cs

using System;
using Stylet;

namespace Stylet.Samples.NavigationController.Pages
{
    public class ShellViewModel : Conductor<IScreen>, INavigationControllerDelegate
    {
        public HeaderViewModel HeaderViewModel { get; }

        public ShellViewModel(HeaderViewModel headerViewModel)
        {
            this.HeaderViewModel = headerViewModel ?? throw new ArgumentNullException(nameof(headerViewModel));
        }

        public void NavigateTo(IScreen screen)
        {
            this.ActivateItem(screen);
        }
    }
}