make fields readonly

src/Services/Ordering/Ordering.Domain/AggregatesModel/BuyerAggregate/PaymentMethod.cs

@@ -7,13 +7,13 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.B
 	public class PaymentMethod
 	   : Entity
 	{
-        private string _alias;
-        private string _cardNumber;
-        private string _securityNumber;
-        private string _cardHolderName;
-        private DateTime _expiration;
+		private readonly string _alias;
+		private readonly string _cardNumber;
+		private readonly string _securityNumber;
+		private readonly string _cardHolderName;
+		private readonly DateTime _expiration;
 
-        private int _cardTypeId;
+		private readonly int _cardTypeId;
 		public CardType CardType { get; private set; }
 
 
@@ -36,11 +36,9 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.B
 			_cardTypeId = cardTypeId;
 		}
 
-        public bool IsEqualTo(int cardTypeId, string cardNumber,DateTime expiration)
-        {
-            return _cardTypeId == cardTypeId
+		public bool IsEqualTo(int cardTypeId, string cardNumber, DateTime expiration) 
+			=> _cardTypeId == cardTypeId
 			   && _cardNumber == cardNumber
 			   && _expiration == expiration;
 	}
-    }
 }

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

@@ -13,7 +13,7 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 		// DDD Patterns comment
 		// Using private fields, allowed since EF Core 1.1, is a much better encapsulation
 		// aligned with DDD Aggregates and Domain Entities (Instead of properties and property collections)
-        private DateTime _orderDate;
+		private readonly DateTime _orderDate;
 
 		// Address is a Value Object pattern example persisted as EF Core 2.0 owned entity
 		public Address Address { get; private set; }
@@ -41,12 +41,15 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 
 		public static Order NewDraft()
 		{
-            var order = new Order();
-            order._isDraft = true;
+			var order = new Order
+			{
+				_isDraft = true
+			};
 			return order;
 		}
 
-        protected Order() {
+		protected Order()
+		{
 			_orderItems = new List<OrderItem>();
 			_isDraft = false;
 		}
@@ -96,14 +99,10 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 		}
 
 		public void SetPaymentId(int id) 
-        {
-            _paymentMethodId = id;
-        }
+			=> _paymentMethodId = id;
 
 		public void SetBuyerId(int id) 
-        {
-            _buyerId = id;
-        }
+			=> _buyerId = id;
 
 		public void SetAwaitingValidationStatus()
 		{
@@ -183,18 +182,14 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 														   cardNumber, cardSecurityNumber,
 														   cardHolderName, cardExpiration);
 
-            this.AddDomainEvent(orderStartedDomainEvent);
+			AddDomainEvent(orderStartedDomainEvent);
 		}
 
 		private void StatusChangeException(OrderStatus orderStatusToChange)
-        {
-            throw new OrderingDomainException($"Is not possible to change the order status from {OrderStatus.Name} to {orderStatusToChange.Name}.");
-        }
+			=> throw new OrderingDomainException($"Is not possible to change the order status from {OrderStatus.Name} to {orderStatusToChange.Name}.");
 
 		public decimal GetTotal() 
-        {
-            return _orderItems.Sum(o => o.GetUnits() * o.GetUnitPrice());
-        }
+			=> _orderItems.Sum(o => o.GetUnits() * o.GetUnitPrice());
 	}
 }
 

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

@@ -1,6 +1,5 @@
 using Microsoft.eShopOnContainers.Services.Ordering.Domain.Seedwork;
 using Ordering.Domain.Exceptions;
-using System;
 
 namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate
 {
@@ -10,9 +9,9 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 		// DDD Patterns comment
 		// Using private fields, allowed since EF Core 1.1, is a much better encapsulation
 		// aligned with DDD Aggregates and Domain Entities (Instead of properties and property collections)
-        private string  _productName;
-        private string  _pictureUrl;
-        private decimal _unitPrice;
+		private readonly string  _productName;
+		private readonly string  _pictureUrl;
+		private readonly decimal _unitPrice;
 		private decimal          _discount;
 		private int              _units;
 
@@ -44,19 +43,13 @@ namespace Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.O
 		public string GetPictureUri() => _pictureUrl;
 
 		public decimal GetCurrentDiscount() 
-        {
-            return _discount;
-        }
+			=> _discount;
 
 		public int GetUnits() 
-        {
-            return _units;
-        }
+			=> _units;
 
 		public decimal GetUnitPrice() 
-        {
-            return _unitPrice;
-        }
+			=> _unitPrice;
 
 		public string GetOrderItemProductName() => _productName;