try NavBar

Apollon.WPF/ViewModels/NavBarPreparationViewModel.cs

@@ -0,0 +1,19 @@
+using Apollon.WPF.Commands;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace Apollon.WPF.ViewModels
+{
+    public class NavBarPreparationViewModel : ViewModelBase
+    {
+        public ICommand NavigateArchersCommand { get;}
+        public ICommand NavigateGroupsCommand { get;}
+        public ICommand NavigateClassesCommand { get;}
+
+        
+    }
+}