viewmodel ins wpf gepackt, build failed

DaSaSo.Wpf/ViewModel/Commands/EditBuildingsiteCommand.cs

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+using DaSaSo.Domain.Model;
+using DaSaSo.Domain.Services;
+using DaSaSo.Domain.Services.BuildingsiteServices;
+using DaSaSo.Wpf.ViewModel.Interface;
+using System.ComponentModel;
+using System.Threading.Tasks;
+
+namespace DaSaSo.Wpf.ViewModel.Commands
+{
+    public class EditBuildingsiteCommand : AsyncCommandBase
+    {
+        private IDataService<Buildingsite> buildingSiteDataService;
+        private IActualProject actualProject;
+        private IRenavigator renavigator;
+        private IBuildingsiteService buildingsiteService;
+        private BuildingsiteListViewModel _buildingsiteListViewModel;
+        public override bool CanExecute(object? parameter)
+        {
+            return _buildingsiteListViewModel.CanSelectBuildingsite;
+        }
+
+        public EditBuildingsiteCommand(IDataService<Buildingsite> buildingSiteDataService, IActualProject actualProject, IRenavigator renavigator, IBuildingsiteService buildingsiteService, BuildingsiteListViewModel buildingsiteListViewModel)
+        {
+            this.buildingSiteDataService = buildingSiteDataService;
+            this.actualProject = actualProject;
+            this.renavigator = renavigator;
+            this.buildingsiteService = buildingsiteService;
+            _buildingsiteListViewModel = buildingsiteListViewModel;
+            _buildingsiteListViewModel.PropertyChanged += BuildingsiteListViewModel_PropertyChanged;
+        }
+
+        private void BuildingsiteListViewModel_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == nameof(_buildingsiteListViewModel.CanSelectBuildingsite))
+                OnCanExecuteChanged();
+        }
+
+        public override async Task ExecuteAsync(object? parameter)
+        {
+            actualProject.SetBuildingSite(_buildingsiteListViewModel.SelectedBuildingsite);
+            renavigator.Renavigate();
+        }
+    }
+}