.NET in 3-teir Architecture

Hey,
Before we get into the real coding in .NET, Let me give a basic idea of what a 3-teir Architecture is and how you can build your very powerful .NET applications on that basis.
Lets think of an example, where we have to enter our data in a registration form on the internet and you get an e-mail confirmation. The registration form where we enter our data on the web, the look we see and the feel we get is in the first layer also called front end and the data that is being stored when we submit the form is stored in the database layer also called the back end layer. Finally the logic behind the communication between the front and the backend layer is implemented in the middle tier, i call it as the logical layer.
To put the above 3 tier in the .NET (web application) words, it can be explained as follows, the front end (first tier) can be implemented in ASP.NET which is a drag and drop application, the back end (third tier) can be done using any database like SQL Server, Oracle, MS-Access, XML etc and the main tier(logical layer) can be done in either C# or VB.NET
so in real words...
front end --- ASP.NET
logical layer -- C# or VB.NET
back end --- SQL Server, Oracle, MS-Access, XML etc (databases)

Note: The above article is in my own words so, if there are any misspells or does have any mistakes, please ignore but the concept is crispy. The next article will be a basic web application with a registration form.