Client wird gespeichert mittels interface

DaSaSo.ViewModel/Commands/SelectClientCommand.cs

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+using DaSaSo.ViewModel.Interface;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace DaSaSo.ViewModel.Commands
+{
+    public class SelectClientCommand : ICommand
+    {
+        public event EventHandler? CanExecuteChanged;
+        private readonly IActualProject _actualProject;
+        private readonly ClientListViewModel _clientListViewModel;
+        public SelectClientCommand(IActualProject actualProject, ClientListViewModel clientListViewModel)
+        {
+            _actualProject = actualProject;
+            _clientListViewModel = clientListViewModel;
+        }
+
+        public bool CanExecute(object? parameter)
+        {
+            return true;
+        }
+
+        public void Execute(object? parameter)
+        {
+            var s = _clientListViewModel.SelectedClient;
+            _actualProject.SetClient(s);
+        }
+    }
+}