-
Book Overview & Buying
-
Table Of Contents
Architecting ASP.NET Core Applications - Third Edition
By :
The Singleton pattern is obsolete, goes against the SOLID principles, and we replace it with a lifetime, as we’ve already seen. This section explores that lifetime and recreates the good old application state, which is nothing more than a singleton-scoped dictionary.
We explore two examples: one about the application state, in case you were wondering where that feature disappeared to. Then, the Wishlist project also uses the singleton lifetime to provide an application-level feature. There are also a few unit tests to play with testability and to allow safe refactoring.
You might remember the application state if you programmed ASP.NET using .NET Framework or the “good” old classic ASP with VBScript. If you don’t, the application state was a key/value dictionary that allowed you to store data globally in your application, shared between all sessions and requests. That is one...