сделано удаление блюда из списка заказа

Cafe2/AddWindows/AddOrderWindow.xaml.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
@@ -18,7 +17,9 @@ namespace Cafe.AddWindows
 
         private void DeliteDishClick(object sender, RoutedEventArgs e)
         {
-            DishesList.Items.Remove((Dishes)DishesList.SelectedItem);
+            Dishes dish = (sender as FrameworkElement).DataContext as Dishes;
+
+            DishesList.Items.Remove(dish);
         }
 
         private void DishesListSelectionChanged(object sender, SelectionChangedEventArgs e)