Update: DataFileSingleton Load Data with Orders

MotorPlant/MotorPlantFileImplement/DataFileSingleton.cs

@@ -27,7 +27,7 @@ namespace MotorPlantFileImplement
         {
             Components = LoadData(ComponentFileName, "Component", x => Component.Create(x)!)!;
             Engines = LoadData(EngineFileName, "Engine", x => Engine.Create(x)!)!;
-            Orders = new List<Order>();
+            Orders = LoadData(OrderFileName, "Order", x => Order.Create(x)!)!;
         }
         private static List<T>? LoadData<T>(string filename, string xmlNodeName, Func<XElement, T> selectFunction)
         {