Initial Upgrade to .NET Core 2.0 (#50)

* Ardalis/upgrade1 (#44)

* Upgrading to netcore 2.0
Updating repository to support async options and refactoring to use it.

* Starting work on tracking customer orders feature.

* Cleaning up some bugs
Working on basket view component implementation

* Fixing up styles, especially for basket in header.

* Adding Order Features (#47)

* Working on order model binding from checkout page - WIP

* Small layout tweaks (#43)

* Updating quantities implemented.

* Fixed basket widget count

* Order History (#49)

* working on creating and viewing orders.
* Working on wiring up listing of orders
* List orders page works as expected. Needed to support ThenInclude scenarios. Currently using strings.

src/ApplicationCore/Entities/BuyerAggregate/Buyer.cs

@@ -0,0 +1,26 @@
+using ApplicationCore.Interfaces;
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ApplicationCore.Entities.BuyerAggregate
+{
+    public class Buyer : BaseEntity, IAggregateRoot
+    {
+        public string IdentityGuid { get; private set; }
+
+        private List<PaymentMethod> _paymentMethods = new List<PaymentMethod>();
+
+        public IEnumerable<PaymentMethod> PaymentMethods => _paymentMethods.AsReadOnly();
+
+        protected Buyer()
+        {
+        }
+
+        public Buyer(string identity) : this()
+        {
+            IdentityGuid = !string.IsNullOrWhiteSpace(identity) ? identity : throw new ArgumentNullException(nameof(identity));
+        }
+    }
+}

src/ApplicationCore/Entities/BuyerAggregate/PaymentMethod.cs

@@ -0,0 +1,11 @@
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+
+namespace ApplicationCore.Entities.BuyerAggregate
+{
+    public class PaymentMethod : BaseEntity
+    {
+        public string Alias { get; set; }
+        public string CardId { get; set; } // actual card data must be stored in a PCI compliant system, like Stripe
+        public string Last4 { get; set; }
+    }
+}