IceCreamShop/IceCreamShopBusinessLogic/BusinessLogic/OrderLogic.cs

@@ -18,6 +18,7 @@ namespace IceCreamShopBusinessLogic.BusinessLogic
     {
         private readonly ILogger _logger;
         private readonly IOrderStorage _orderStorage;
+        static readonly object locker = new object();
 
         public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage)
         {
@@ -92,7 +93,10 @@ namespace IceCreamShopBusinessLogic.BusinessLogic
 
         public bool TakeOrderInWork(OrderBindingModel model)
         {
-            return ChangeStatus(model, OrderStatus.Выполняется);
+            lock (locker)
+            {
+                return ChangeStatus(model, OrderStatus.Выполняется);
+            }
         }
 
         public bool FinishOrder(OrderBindingModel model)