public void SetCustomValidationOptionsAsDefault()
        {
            // change the default options, turning off "OnAttach"
            var valOpts = new ValidationOptions { ValidationApplicability = ValidationApplicability.OnPropertyChange | ValidationApplicability.OnSave };
          
          var oldValOpts = ValidationOptions.Default;
          try {
            // make custom ValidationOptions the default for all future managers
            ValidationOptions.Default = valOpts;

            var manager = new EntityManager(_serviceName); // new empty EntityManager
            Assert.AreEqual(valOpts, manager.ValidationOptions);
          }
          finally {
            ValidationOptions.Default = oldValOpts;
          }
        }
        public async Task DoesNotValidateOnAttachWhenOptionIsOff()
        {
            var manager = new EntityManager(_serviceName); // new empty EntityManager
            await manager.FetchMetadata(); // required before creating a new entity

            // change the default options, turning off "OnAttach"
            var valOpts = new ValidationOptions { ValidationApplicability = ValidationApplicability.OnPropertyChange | ValidationApplicability.OnSave };
            
            // reset manager's options
            manager.ValidationOptions = valOpts;

            var customer = new Customer();
            manager.AttachEntity(customer);

            var validationErrors = customer.EntityAspect.ValidationErrors;
            Assert.IsFalse(validationErrors.Any(), "Should be no validation errors even though CompanyName is required.");
        }