Mike,

>I want to strengthen my skills with this matter, do you know a site where I can download sample codes or tutorials that implements this architecture?

You might find some interesting reading at the .NET Architecture Center: http://msdn.microsoft.com/architecture/journal/

Kevin also posted a few good links for information. Happy Reading!! =)

~~Bonnie



>Thanks Bonnie...
>
>It's now crystal clear that anything pertaining to data manipulation should be done in the DataAccess Layer. Be it retrieving of records, updating, inserting or deletions.
>
>We can Accomplish these tasks by passing around the DataSets from each layer to the other.
>
>I want to strengthen my skills with this matter, do you know a site where I can download sample codes or tutorials that implements this architecture?
>
>
>Thanks in advance...