diff --git a/src/BuildingBlocks/EventBus/EventBus/Events/IntegrationEvent.cs b/src/BuildingBlocks/EventBus/EventBus/Events/IntegrationEvent.cs
index ef09911fe..3fc04c1b0 100644
--- a/src/BuildingBlocks/EventBus/EventBus/Events/IntegrationEvent.cs
+++ b/src/BuildingBlocks/EventBus/EventBus/Events/IntegrationEvent.cs
@@ -3,7 +3,7 @@ using Newtonsoft.Json;
 
 namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events
 {
-    public class IntegrationEvent
+    public record IntegrationEvent
     {
         public IntegrationEvent()
         {
@@ -19,9 +19,9 @@ namespace Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events
         }
 
         [JsonProperty]
-        public Guid Id { get; private set; }
+        public Guid Id { get; private init; }
 
         [JsonProperty]
-        public DateTime CreationDate { get; private set; }
+        public DateTime CreationDate { get; private init; }
     }
 }
diff --git a/src/Services/Basket/Basket.API/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs b/src/Services/Basket/Basket.API/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
index b78d10c05..cb4a63f32 100644
--- a/src/Services/Basket/Basket.API/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
+++ b/src/Services/Basket/Basket.API/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
@@ -5,9 +5,9 @@ namespace Basket.API.IntegrationEvents.Events
     // Integration Events notes: 
     // An Event is “something that has happened in the past”, therefore its name has to be   
     // An Integration Event is an event that can cause side effects to other microsrvices, Bounded-Contexts or external systems.
-    public class OrderStartedIntegrationEvent : IntegrationEvent
+    public record OrderStartedIntegrationEvent : IntegrationEvent
     {
-        public string UserId { get; set; }
+        public string UserId { get; init; }
 
         public OrderStartedIntegrationEvent(string userId)
             => UserId = userId;            
diff --git a/src/Services/Basket/Basket.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs b/src/Services/Basket/Basket.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
index 6f51010be..a06947b65 100644
--- a/src/Services/Basket/Basket.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
+++ b/src/Services/Basket/Basket.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
@@ -5,13 +5,13 @@ namespace Microsoft.eShopOnContainers.Services.Basket.API.IntegrationEvents.Even
     // Integration Events notes: 
     // An Event is “something that has happened in the past”, therefore its name has to be   
     // An Integration Event is an event that can cause side effects to other microsrvices, Bounded-Contexts or external systems.
-    public class ProductPriceChangedIntegrationEvent : IntegrationEvent
+    public record ProductPriceChangedIntegrationEvent : IntegrationEvent
     {        
-        public int ProductId { get; private set; }
+        public int ProductId { get; private init; }
 
-        public decimal NewPrice { get; private set; }
+        public decimal NewPrice { get; private init; }
 
-        public decimal OldPrice { get; private set; }
+        public decimal OldPrice { get; private init; }
 
         public ProductPriceChangedIntegrationEvent(int productId, decimal newPrice, decimal oldPrice)
         {
diff --git a/src/Services/Basket/Basket.API/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs b/src/Services/Basket/Basket.API/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
index 18d522cf6..e79e0fbdd 100644
--- a/src/Services/Basket/Basket.API/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
+++ b/src/Services/Basket/Basket.API/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
@@ -4,37 +4,37 @@ using System;
 
 namespace Basket.API.IntegrationEvents.Events
 {
-    public class UserCheckoutAcceptedIntegrationEvent : IntegrationEvent
+    public record UserCheckoutAcceptedIntegrationEvent : IntegrationEvent
     {
         public string UserId { get; }
 
         public string UserName { get; }
 
-        public int OrderNumber { get; set; }
+        public int OrderNumber { get; init; }
 
-        public string City { get; set; }
+        public string City { get; init; }
 
-        public string Street { get; set; }
+        public string Street { get; init; }
 
-        public string State { get; set; }
+        public string State { get; init; }
 
-        public string Country { get; set; }
+        public string Country { get; init; }
 
-        public string ZipCode { get; set; }
+        public string ZipCode { get; init; }
 
-        public string CardNumber { get; set; }
+        public string CardNumber { get; init; }
 
-        public string CardHolderName { get; set; }
+        public string CardHolderName { get; init; }
 
-        public DateTime CardExpiration { get; set; }
+        public DateTime CardExpiration { get; init; }
 
-        public string CardSecurityNumber { get; set; }
+        public string CardSecurityNumber { get; init; }
 
-        public int CardTypeId { get; set; }
+        public int CardTypeId { get; init; }
 
-        public string Buyer { get; set; }
+        public string Buyer { get; init; }
 
-        public Guid RequestId { get; set; }
+        public Guid RequestId { get; init; }
 
         public CustomerBasket Basket { get; }
 
diff --git a/src/Services/Basket/Basket.API/Model/BasketCheckout.cs b/src/Services/Basket/Basket.API/Model/BasketCheckout.cs
index 70173611f..410700773 100644
--- a/src/Services/Basket/Basket.API/Model/BasketCheckout.cs
+++ b/src/Services/Basket/Basket.API/Model/BasketCheckout.cs
@@ -2,29 +2,29 @@
 
 namespace Basket.API.Model
 {
-    public record BasketCheckout
+    public class BasketCheckout
     {
-        public string City { get; init; }
+        public string City { get; set; }
 
-        public string Street { get; init; }
+        public string Street { get; set; }
 
-        public string State { get; init; }
+        public string State { get; set; }
 
-        public string Country { get; init; }
+        public string Country { get; set; }
 
-        public string ZipCode { get; init; }
+        public string ZipCode { get; set; }
 
-        public string CardNumber { get; init; }
+        public string CardNumber { get; set; }
 
-        public string CardHolderName { get; init; }
+        public string CardHolderName { get; set; }
 
-        public DateTime CardExpiration { get; init; }
+        public DateTime CardExpiration { get; set; }
 
-        public string CardSecurityNumber { get; init; }
+        public string CardSecurityNumber { get; set; }
 
-        public int CardTypeId { get; init; }
+        public int CardTypeId { get; set; }
 
-        public string Buyer { get; init; }
+        public string Buyer { get; set; }
 
         public Guid RequestId { get; set; }
     }
diff --git a/src/Services/Basket/Basket.API/Model/BasketItem.cs b/src/Services/Basket/Basket.API/Model/BasketItem.cs
index e0414884c..4d2e4f331 100644
--- a/src/Services/Basket/Basket.API/Model/BasketItem.cs
+++ b/src/Services/Basket/Basket.API/Model/BasketItem.cs
@@ -3,15 +3,15 @@ using System.ComponentModel.DataAnnotations;
 
 namespace Microsoft.eShopOnContainers.Services.Basket.API.Model
 {
-    public record BasketItem : IValidatableObject
+    public class BasketItem : IValidatableObject
     {
-        public string Id { get; init; }
-        public int ProductId { get; init; }
-        public string ProductName { get; init; }
+        public string Id { get; set; }
+        public int ProductId { get; set; }
+        public string ProductName { get; set; }
         public decimal UnitPrice { get; set; }
         public decimal OldUnitPrice { get; set; }
-        public int Quantity { get; init; }
-        public string PictureUrl { get; init; }
+        public int Quantity { get; set; }
+        public string PictureUrl { get; set; }
         public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
         {
             var results = new List<ValidationResult>();
diff --git a/src/Services/Basket/Basket.API/Model/CustomerBasket.cs b/src/Services/Basket/Basket.API/Model/CustomerBasket.cs
index e8dc14edb..9ae495d4f 100644
--- a/src/Services/Basket/Basket.API/Model/CustomerBasket.cs
+++ b/src/Services/Basket/Basket.API/Model/CustomerBasket.cs
@@ -2,9 +2,9 @@
 
 namespace Microsoft.eShopOnContainers.Services.Basket.API.Model
 {
-    public record CustomerBasket
+    public class CustomerBasket
     {
-        public string BuyerId { get; init; }
+        public string BuyerId { get; set; }
 
         public List<BasketItem> Items { get; set; } = new List<BasketItem>();
 
diff --git a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
index 9787aaedd..b1061f60e 100644
--- a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
+++ b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using BuildingBlocks.EventBus.Events;
     using System.Collections.Generic;
 
-    public class OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public IEnumerable<OrderStockItem> OrderStockItems { get; }
@@ -16,7 +16,7 @@
         }
     }
 
-    public class OrderStockItem
+    public record OrderStockItem
     {
         public int ProductId { get; }
         public int Units { get; }
diff --git a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
index 881aa21fe..d5a295cc5 100644
--- a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
+++ b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using System.Collections.Generic;
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public IEnumerable<OrderStockItem> OrderStockItems { get; }
diff --git a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
index b91eaae43..6c6a3cfa4 100644
--- a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
+++ b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using BuildingBlocks.EventBus.Events;
 
-    public class OrderStockConfirmedIntegrationEvent : IntegrationEvent
+    public record OrderStockConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
index eb74af8dd..7c098edf4 100644
--- a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
+++ b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using BuildingBlocks.EventBus.Events;
     using System.Collections.Generic;
 
-    public class OrderStockRejectedIntegrationEvent : IntegrationEvent
+    public record OrderStockRejectedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
@@ -17,7 +17,7 @@
         }
     }
 
-    public class ConfirmedOrderStockItem
+    public record ConfirmedOrderStockItem
     {
         public int ProductId { get; }
         public bool HasStock { get; }
diff --git a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
index 00f25b9e5..004c938a1 100644
--- a/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
+++ b/src/Services/Catalog/Catalog.API/IntegrationEvents/Events/ProductPriceChangedIntegrationEvent.cs
@@ -5,13 +5,13 @@
     // Integration Events notes: 
     // An Event is “something that has happened in the past”, therefore its name has to be past tense
     // An Integration Event is an event that can cause side effects to other microservices, Bounded-Contexts or external systems.
-    public class ProductPriceChangedIntegrationEvent : IntegrationEvent
+    public record ProductPriceChangedIntegrationEvent : IntegrationEvent
     {        
-        public int ProductId { get; private set; }
+        public int ProductId { get; private init; }
 
-        public decimal NewPrice { get; private set; }
+        public decimal NewPrice { get; private init; }
 
-        public decimal OldPrice { get; private set; }
+        public decimal OldPrice { get; private init; }
 
         public ProductPriceChangedIntegrationEvent(int productId, decimal newPrice, decimal oldPrice)
         {
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/GracePeriodConfirmedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/GracePeriodConfirmedIntegrationEvent.cs
index 15b0aebb5..1eac25205 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/GracePeriodConfirmedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/GracePeriodConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class GracePeriodConfirmedIntegrationEvent : IntegrationEvent
+    public record GracePeriodConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent .cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent .cs
index fec066521..a4d1c70f6 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent .cs	
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent .cs	
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderPaymentFailedIntegrationEvent : IntegrationEvent
+    public record OrderPaymentFailedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
index 9b220c7b7..8897deb31 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderPaymentSucceededIntegrationEvent : IntegrationEvent
+    public record OrderPaymentSucceededIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
index 4a5d7db38..a47fb7988 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStartedIntegrationEvent.cs
@@ -9,7 +9,7 @@ namespace Ordering.API.Application.IntegrationEvents.Events
     // Integration Events notes: 
     // An Event is “something that has happened in the past”, therefore its name has to be   
     // An Integration Event is an event that can cause side effects to other microsrvices, Bounded-Contexts or external systems.
-    public class OrderStartedIntegrationEvent : IntegrationEvent
+    public record OrderStartedIntegrationEvent : IntegrationEvent
     {
         public string UserId { get; set; }
 
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
index a104215af..673b445cf 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using System.Collections.Generic;
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
@@ -20,7 +20,7 @@
         }
     }
 
-    public class OrderStockItem
+    public record OrderStockItem
     {
         public int ProductId { get; }
         public int Units { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
index 6ff92a1d3..34524f0c0 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.API.Application.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToCancelledIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToCancelledIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
index 6bcbc3494..50d6f7e72 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using System.Collections.Generic;
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
index 1753fcc78..dc48ac06d 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.API.Application.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
index 24e51f55b..d87e30b81 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedTosubmittedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedTosubmittedIntegrationEvent.cs
index 816c8bddf..82f1125da 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedTosubmittedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStatusChangedTosubmittedIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.API.Application.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToSubmittedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToSubmittedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
index 4bcc9aab5..2b09c8655 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStockConfirmedIntegrationEvent : IntegrationEvent
+    public record OrderStockConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
index 647970581..c16148f84 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/OrderStockRejectedIntegrationEvent.cs
@@ -3,7 +3,7 @@
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
     using System.Collections.Generic;
 
-    public class OrderStockRejectedIntegrationEvent : IntegrationEvent
+    public record OrderStockRejectedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
@@ -17,7 +17,7 @@
         }
     }
 
-    public class ConfirmedOrderStockItem
+    public record ConfirmedOrderStockItem
     {
         public int ProductId { get; }
         public bool HasStock { get; }
diff --git a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
index 2cb49aae0..4cd74b16b 100644
--- a/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.API/Application/IntegrationEvents/Events/UserCheckoutAcceptedIntegrationEvent.cs
@@ -4,7 +4,7 @@ using System;
 
 namespace Ordering.API.Application.IntegrationEvents.Events
 {
-    public class UserCheckoutAcceptedIntegrationEvent : IntegrationEvent
+    public record UserCheckoutAcceptedIntegrationEvent : IntegrationEvent
     {
         public string UserId { get; }
 
diff --git a/src/Services/Ordering/Ordering.BackgroundTasks/Events/GracePeriodConfirmedIntegrationEvent.cs b/src/Services/Ordering/Ordering.BackgroundTasks/Events/GracePeriodConfirmedIntegrationEvent.cs
index 8fe92df76..e6b4f4dc7 100644
--- a/src/Services/Ordering/Ordering.BackgroundTasks/Events/GracePeriodConfirmedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.BackgroundTasks/Events/GracePeriodConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class GracePeriodConfirmedIntegrationEvent : IntegrationEvent
+    public record GracePeriodConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
index 2c5ecee27..c1a3e0a27 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToAwaitingValidationIntegrationEvent.cs
@@ -3,7 +3,7 @@ using System.Collections.Generic;
 
 namespace Ordering.SignalrHub.IntegrationEvents
 {
-    public class OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToAwaitingValidationIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
index e9ac5b39b..038b14a5a 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToCancelledIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.SignalrHub.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToCancelledIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToCancelledIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
index beb49965d..349c9f1a7 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToPaidIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.SignalrHub.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
index 0768c7f4e..4804dd504 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToShippedIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.SignalrHub.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
index 588505c8f..137967ff6 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 
 namespace Ordering.SignalrHub.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToSubmittedIntegrationEvent.cs b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToSubmittedIntegrationEvent.cs
index 5ea0cec71..3b1e04438 100644
--- a/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToSubmittedIntegrationEvent.cs
+++ b/src/Services/Ordering/Ordering.SignalrHub/IntegrationEvents/Events/OrderStatusChangedToSubmittedIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Ordering.SignalrHub.IntegrationEvents.Events
 {
-    public class OrderStatusChangedToSubmittedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToSubmittedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public string OrderStatus { get; }
diff --git a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent.cs b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent.cs
index d51c518c4..953e5dbaa 100644
--- a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent.cs
+++ b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentFailedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderPaymentFailedIntegrationEvent : IntegrationEvent
+    public record OrderPaymentFailedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
index 728b0d5a7..317ef8554 100644
--- a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
+++ b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderPaymentSucceededIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderPaymentSucceededIntegrationEvent : IntegrationEvent
+    public record OrderPaymentSucceededIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
index 88f60e0d6..caa3295d5 100644
--- a/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
+++ b/src/Services/Payment/Payment.API/IntegrationEvents/Events/OrderStatusChangedToStockConfirmedIntegrationEvent.cs
@@ -2,7 +2,7 @@
 {
     using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
 
-    public class OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToStockConfirmedIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
 
diff --git a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToPaidIntegrationEvent.cs b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToPaidIntegrationEvent.cs
index c4adda56e..3f532ef0a 100644
--- a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToPaidIntegrationEvent.cs
+++ b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToPaidIntegrationEvent.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace Webhooks.API.IntegrationEvents
 {
-    public class OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToPaidIntegrationEvent : IntegrationEvent
     {
         public int OrderId { get; }
         public IEnumerable<OrderStockItem> OrderStockItems { get; }
@@ -19,7 +19,7 @@ namespace Webhooks.API.IntegrationEvents
         }
     }
 
-    public class OrderStockItem
+    public record OrderStockItem
     {
         public int ProductId { get; }
         public int Units { get; }
diff --git a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToShippedIntegrationEvent.cs b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToShippedIntegrationEvent.cs
index 10693eb8b..2b03abacf 100644
--- a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToShippedIntegrationEvent.cs
+++ b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/OrderStatusChangedToShippedIntegrationEvent.cs
@@ -1,16 +1,12 @@
 using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace Webhooks.API.IntegrationEvents
 {
-    public class OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
+    public record OrderStatusChangedToShippedIntegrationEvent : IntegrationEvent
     {
-        public int OrderId { get; private set; }
-        public string OrderStatus { get; private set; }
-        public string BuyerName { get; private set; }
+        public int OrderId { get; private init; }
+        public string OrderStatus { get; private init; }
+        public string BuyerName { get; private init; }
 
         public OrderStatusChangedToShippedIntegrationEvent(int orderId, string orderStatus, string buyerName)
         {
diff --git a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/ProductPriceChangedIntegrationEvent.cs b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/ProductPriceChangedIntegrationEvent.cs
index 18821f9fc..8fb860007 100644
--- a/src/Services/Webhooks/Webhooks.API/IntegrationEvents/ProductPriceChangedIntegrationEvent.cs
+++ b/src/Services/Webhooks/Webhooks.API/IntegrationEvents/ProductPriceChangedIntegrationEvent.cs
@@ -1,18 +1,14 @@
 using Microsoft.eShopOnContainers.BuildingBlocks.EventBus.Events;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace Webhooks.API.IntegrationEvents
 {
-    public class ProductPriceChangedIntegrationEvent : IntegrationEvent
+    public record ProductPriceChangedIntegrationEvent : IntegrationEvent
     {
-        public int ProductId { get; private set; }
+        public int ProductId { get; private init; }
 
-        public decimal NewPrice { get; private set; }
+        public decimal NewPrice { get; private init; }
 
-        public decimal OldPrice { get; private set; }
+        public decimal OldPrice { get; private init; }
 
         public ProductPriceChangedIntegrationEvent(int productId, decimal newPrice, decimal oldPrice)
         {