How to use Three Tier Architecture in .NET


Here I will explain about uses of 3-Tier architecture and how to create 3-tier architecture for our project in


1. What is the use of 3-tier architecture and why we go for that architecture?
2. First we need to know what 3-Tier architecture is.
3. How to create 3-Tier architecture for our project?

Uses of 3-Tier Architecture

1. To make application more understandable.
2. Easy to maintain, easy to modify application and we can maintain good look of architecture.

3. If we use this 3-Tier application we can maintain our application in consistency manner.

Basically 3-Tier architecture contains 3 layers

1. Application Layer or Presentation Layer
2. Business Access Layer(BAL) or Business Logic Layer(BLL)
3. Data Access Layer(DAL)

Here I will explain each layer with simple example that is User Registration

Application Layer or Presentation Layer

Presentation layer contains UI part of our application i.e., our aspx pages or input is taken from the user. This layer mainly used for design purpose and get or set the data back and forth. Here I have designed my registration aspx page like this:

Hello world!

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