This is what I've been doing so far in my business layer to return error messages to the user.   public void CreateMerchant(MerchantCreationModel model, out MerchantCreationStatus status){    //check if merchantId exists    MerchantDTO merchant = _merchantRepo.GetMerchant(model.MerchantId);    if (merchant != null)    {        status = MerchantCreationStatus.MerchantAlreadyExists;        return;    }    // Rest of merchant creation logic has been removed for clarity    status = MerchantCreationStatus.Success;}I have a ErrorCodeToString() method in my controller that gets the text to display.What do you think of this technique?
Returning status codes from business layer
c#;error handling;asp.net mvc