How many layers will be used in ASP.net application?

I have migrated one asp application into the ASP.Net application, in asp.net application I have created the design pages dynami开发者_JAVA技巧cally from .aspx.cs file. Now i want know How many layers are used in my application.

Well, if you have a simple ASP.NET application without and business layer or even database or accessing other external resources, you have a single layer application. Add a database and you have to two layer. Business logic layer would be the third