Even if this pattern comes with a lot of advantages, there are distinct disadvantages too. Firstly, it is too complex to implement and is not suitable for smaller application; rather, implementing this pattern in such applications will have adverse effects in the application's performance and design. In this regard, the MSDN states, "You are building a Web application in Microsoft ASP.NET, and, based on the complexity of your application, you need to separate different aspects of the program to reduce code duplication and to limit the propagation of change." This is where this design pattern fits in.

Well, let us now dig into some code. In the section that follows we will learn how we can implement this pattern in ASP.NET applications.