Rework so employee dont use repos but servies

PointOfSale/Pos.Ui/Pos/Setting/SettingWindow.xaml.cs

@@ -11,8 +11,8 @@ using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
 using System.Windows.Shapes;
-using Database.Repository;
 using Pos.Category;
+using Pos.Service;
 using Pos.Setting.ProductGroup;
 
 namespace Pos.Setting
@@ -22,6 +22,9 @@ namespace Pos.Setting
     /// </summary>
     public partial class SettingWindow : Window
     {
+        private readonly ProductGroupService _productGroupService =
+            new ProductGroupService();
+
         public SettingWindow()
         {
             InitializeComponent();
@@ -42,10 +45,8 @@ namespace Pos.Setting
 
         private void btnProductGroups_Click(object sender, RoutedEventArgs e)
         {
-            ProductWindow productWindow = new ProductWindow();
             //Check if there is any categories, if not close this window with a message.
-            ProductGroupRepository categoryRepository = new ProductGroupRepository();
-            bool anyExist = categoryRepository.Any();
+            bool anyExist = _productGroupService.HasProductGroups();
             if (!anyExist)
             {
                 MessageBox.Show("Der er ingen kategorier, opret dem først", "Kategorier", MessageBoxButton.OK,
@@ -53,6 +54,7 @@ namespace Pos.Setting
             }
             else
             {
+                ProductWindow productWindow = new ProductWindow();
                 productWindow.Show();
             }
         }