Hi,

I am trying to learn NHibernate. I was working on this sample (http://blogs.hibernatingrhinos.com/nhibernate/archive/2008/04/01/your-first-nhibernate-based-application.aspx)

and I was stuck at creating "Domain.cd" file
How its gets created? If its manual, How to create it and when?

2. Always, do we need to write the hbm.xml file manually?

Hi there.

Try to use nhibernate reference. (https://www.hibernate.org/5.html#A27)

And you don't need to write your hbm.xml files.
There is some programs you can use to create them for you, or you can use Fluent, or NHibernate.Mapping.Attributes.

[]s

Thanks for reply! I have 2 more questions.

1.What are the advantages of using NHibernate?

2.If I we use Nhibernate and what is the architecture called? (3 tier)

1)
The advantages of using NHibernate (or another ORM framework) is that you can spend more time developing your application, and let NHibernate deal with SQL and database;

You won't need to write SQL command, like this. INSERT INTO TABLE1, or UPDATE TABLE2 (field1, filed2) VALUES();
instead of that you'll be able to use merge, insert, delete. Simple NHibernate methods.
You'll work with objects. If you are developing using .NET (or JAVA) you're problably using OO.

Your code gets more simple, and easy to mantain and test.

2)
This architecture is called n-tiers. You can have 3 tiers, but sometimes you can have more than that. It all depends on your application.