Service Locator Pattern

• It's a design pattern for simplifying dependency injection
• The ServiceLocator class would be a singleton class whose object contains a dictionary of all dependencies in the project
• the main point of using ServiceLocator is to make the dependencies easily replaceable at runtime
• It can be used along with other IoC containers - IoC containers are good to initialize dependencies whereas service locator can help replacing the dependencies at runtime after initialization when needed

http://msdn.microsoft.com/en-us/library/ff921142.aspx

http://simpleservicelocator.codeplex.com/

The problem with this is that if there is any ref-type property, this doesn't work. Which means every ref-type property must implement its own Equals.