public void DeleteCustomer_RemovesCustomerFirstDataStore()
 {
     using (var bc = new BusinessContext())
     {
         var customer = new Customer {
             Email = "*****@*****.**", FirstName = "1", LastName = "a"
         };
         bc.CreateCustomer(customer);
         bc.DeleteCustomer(customer);
         Assert.IsFalse(bc.DataContext.Customers.Any());
     }
 }