When to use Factory method pattern?

Question

When to use Factory method pattern?

Please provide me some specific idea when to use it in project? and how it is a better way over new keyword?

Answer 1

It's better to have a factory method pattern vs new keyword. The idea is to move complete instantiation of objects outside the business logic. This principle is the crux of dependency injection. And, the work of the factory method can be delegated to a Dependency Injection Framework like Spring.net or Castle Windsor at a later point.