initial load

YouTubeViewers.WPF/ViewModels/MainViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using YouTubeViewers.WPF.Stores;
+
+namespace YouTubeViewers.WPF.ViewModels
+{
+    public class MainViewModel : ViewModelBase
+    {
+        private readonly ModalNavigationStore _modalNavigationStore;
+
+        public ViewModelBase CurrentModalViewModel => _modalNavigationStore.CurrentViewModel;
+        public bool IsModalOpen => _modalNavigationStore.IsOpen;
+        public YouTubeViewersViewModel YouTubeViewersViewModel { get; }        
+        
+        public MainViewModel(ModalNavigationStore modalNavigationStore, YouTubeViewersViewModel youTubeViewersViewModel)
+        {
+            _modalNavigationStore = modalNavigationStore;
+            YouTubeViewersViewModel = youTubeViewersViewModel;
+
+            _modalNavigationStore.CurrentViewModelChanged += ModalNavigationStore_CurrenyViewModelChanged;
+        }
+
+        protected override void Dispose()
+        {
+            _modalNavigationStore.CurrentViewModelChanged -= ModalNavigationStore_CurrenyViewModelChanged;
+            base.Dispose();
+        }
+
+        private void ModalNavigationStore_CurrenyViewModelChanged()
+        {
+            OnPropertyChanged(nameof(CurrentModalViewModel));
+            OnPropertyChanged(nameof(IsModalOpen));
+        }
+    }
+}