Added a comment about Addess as Value Object and EF Core 2.0 onwed entity

src/Services/Ordering/Ordering.Domain/AggregatesModel/OrderAggregate/Order.cs

@@ -15,6 +15,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
         // aligned with DDD Aggregates and Domain Entities (Instead of properties and property collections)
         private DateTime _orderDate;
 
+        // Address is a Value Object pattern example persisted as EF Core 2.0 owned entity
         public Address Address { get; private set; }
 
         private int? _buyerId;