Defines the methods that simplify service location and dependency resolution.
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)
Implementations of this interface should delegate to the underlying dependency injection container to provide the registered service for the requested type. When there are no registered services of the requested type, the ASP.NET MVC framework expects implementations of this interface to return null from GetService and to return an empty collection from GetServices.
For more information about ASP.NET MVC 3 Service Location on Brad Wilson's blog., see the entry