Navigation zwischen views Funktioniert

DaSaSo.ViewModel/Interface/IActualProject.cs

@@ -9,10 +9,15 @@ namespace DaSaSo.ViewModel.Interface
 {
     public interface IActualProject
     {
+        event EventHandler? ClientChanged;
+        event EventHandler? ProjectChanged;
+        event EventHandler? BuildingSiteChanged;
         Client AktuellClient { get; }
         Project AktuellProjekt { get; }
         Buildingsite AktuellBaustelle { get; }
 
         void SetClient(Client client);
+        void SetProject(Project project);
+        void SetBuildingSite(Buildingsite buildingsite);
     }
 }

DaSaSo.ViewModel/Interface/INavigator.cs

@@ -10,6 +10,6 @@ namespace DaSaSo.ViewModel.Interface
     public interface INavigator
     {
         BaseViewModel CurrentViewModel { get; set; }
-        ICommand UpdateViewModelCommand { get; }
+        
     }
 }

DaSaSo.ViewModel/Interface/IRenavigator.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DaSaSo.ViewModel.Interface
+{
+    public interface IRenavigator
+    {
+        void Renavigate();
+    }
+}