C# & sql server 2005

hi friend,

The 3 tier architecture is separating your dataAccessing, Business Logics and Presentations.
DataAccessing- when you connect to database to retrieve, insert or update data.
Business Logic- Some function that deals what to do, when to do, how to do ect....
Presentation- Showing information to the user.

Here the Article that give you very good and short explanation about all three layer and how to create them in c#. you can user any database to implement this architecture in c#

3 tier architecture in c#

Also download the attach project that is implemented using 3-Tier architecture.

Please mark as answer if it helps you.