CycleSales.CycleSalesModel.CycleSalesContext.SaveChanges C# (CSharp) Method

        public override int SaveChanges()
        {
            foreach (var item in this.ChangeTracker.Entries<Bike>().Where(e => e.State == EntityState.Modified))
            {
                // TODO: When supported, update to: item.Property("LastUpdated").CurrentValue = DateTime.Now;
                var prop = Model.GetEntityType(typeof(Bike)).GetProperty("LastUpdated");
                item.StateEntry[prop] = DateTime.Now;
            }

            return base.SaveChanges();
        }

        public void SimpleConversion()
        {
            var options = new DbContextOptions()
                .UseInMemoryStore();

            using (var db = new CycleSalesContext(options))
            {
                // Arange
                db.Bikes.Add(new Bike { Bike_Id = 1, Retail = 100M });
                db.Bikes.Add(new Bike { Bike_Id = 2, Retail = 99.95M });
                db.SaveChanges();

                // Act
                var convertor = new PriceService(db);
                var results = convertor.CalculateForeignPrices(exchangeRate: 2).ToArray();

                // Assert
                Assert.AreEqual(2, results.Length);

                Assert.AreEqual(100M, results[0].USPrice);
                Assert.AreEqual(199.95M, results[0].ForeignPrice);

                Assert.AreEqual(99.95M, results[1].USPrice);
                Assert.AreEqual(199.90M, results[1].ForeignPrice);
            }
        }