Исправление ошибки

AutomobilePlant/AutomobilePlantDataBaseImplements/Implements/CarShopStorage.cs

@@ -90,6 +90,7 @@ namespace AutomobilePlantDataBaseImplements.Implements
             using var context = new AutoPlantDataBase();
             using var transaction = context.Database.BeginTransaction();
             var shops = GetFullList();
+            bool check = false;
             try
             {
                 foreach (var shop in shops)
@@ -100,7 +101,8 @@ namespace AutomobilePlantDataBaseImplements.Implements
                         {
                             shop.Cars[car.Id] = (shop.Cars[car.Id].Item1, shop.Cars[car.Id].Item2 - quantity);
                             quantity = 0;
-                            break;
+                            check = true;
+
                         }
                         else
                         {
@@ -118,6 +120,8 @@ namespace AutomobilePlantDataBaseImplements.Implements
                             Id = shop.Id,
                             Cars = shop.Cars,
                         });
+                        if (check)
+                            break;
 
                     }
                 }
@@ -125,7 +129,12 @@ namespace AutomobilePlantDataBaseImplements.Implements
                 {
                     context.SaveChanges();
                     transaction.Commit();
-                    
+
+                }
+                else
+                {
+                    transaction.Rollback();
+                    return false;
                 }
             }
             catch