This example shows how to decorate method with LucValidation validation attributes and rules.

LucValidationExample1.cs

[ValidateArguments]
public virtual void RegisterUser([Required, UserName]string userName, [Required, Email]string email, [Required, Password]string password, [Required, Password]string rePassword)
{
    if (CheckAllRules(new PasswordsAreSame() { Password = password, RePassword = rePassword},
        new UserNameUnique() { UserName = userName },
        new EmailUnique() { Email = email }))
    {
        User newUser = new User()
        {
            UserName = userName,
            Email = email,
            HashedPassword = new HashProvider().GetPasswordHash(password),
            CreateDate = DateTime.Now,
            IsApproved = false,					
            AuthorizationKey = Guid.NewGuid(),	
            Roles = new List<Role>()
        };
        newUser.Roles.Add(roleQueries.GetByName(RoleNames.User));
        Session.SaveOrUpdate(newUser);
        var emailSent = new EmailSender().SendActivationEmail(newUser.UserName, newUser.Email, newUser.AuthorizationKey);
        if (emailSent == false)
        {
            ValidationResult.AddError(ValidationKeys.Email, ValidationMessages.EmailInvalid);
            Session.Transaction.Rollback();
        }                    
    }	
}