Now more readable :P

readable.cs

namespace iDoc.specs.When
{
    [Subject("AccountManagement")]
    public class CreatingAUserAccount : BaseContext<AccountController>
    {
        const string EmailAddress = @"1@2.com";

        Establish context = () =>
            {
                model = new RegistrationModel { 
                    email = EmailAddress, 
                    password = @"OMG4his_is_very_Secret!" };

              
            };

        Because of = () => result = mockedType.CreateNewAccount(model);

        It should_send_an_email = () => 
            mocker.Get<IEmailProvider>().AssertWasCalled(
            emailProvider => emailProvider.Send(null, new MailAddress(EmailAddress), null, null),
            o => o.IgnoreArguments());

        It should_return_the_successful_view = () =>
            result.ShouldBeOfType<ViewResult>();

        It should_show_a_signed_in_successfully_message = () => 
            result.is_a_view_result_and().ViewData["message"].ShouldEqual("Sign-up successful");
                
        static ActionResult result;
        static RegistrationModel model;

    }
}