public void When_Adding_To_Collection_Should_Be_IChangeTracableTrackable()
{
var orders = Helper.GetOrdersIList();
var trackable = orders.AsTrackable();
trackable.Add(new Order { Id = 999999999, CustomerNumber = "Customer" });
trackable.Single(o => o.Id == 999999999).Should().BeAssignableTo<IChangeTrackable<Order>>();
}