The March 4, 2008 Weekly Drop of Unity is out and includes a number of API Changes on how you register types, resolve instances, and control the lifetime of registered types. In general, SetSingleton is gone, Get has been replaced by Resolve, Register has been replaced by RegisterType, and RegisterType now contains overloads to add a LifeTimeManager Instance.
Unity Sample Code
Here is the sample code from the following post on Unity Nested Containers, which has been updated with the new API Changes:
UnityContainer parentContainer = new UnityContainer();
IUnityContainer childContainer1 = parentContainer.CreateChildContainer();
IUnityContainer childContainer2 = parentContainer.CreateChildContainer();
parentContainer.RegisterType<ILogger, NullLogger>
(new ContainerControlledLifetimeManager());
childContainer1.RegisterType<ILogger, CustomLogger>
(new ContainerControlledLifetimeManager());
// Should be NullLogger
// From ParentContainer
ILogger logger = childContainer2.Resolve<ILogger>();
logger.Log("Test");
// Should be CustomLogger
// From LocalContainer
ILogger logger2 = childContainer1.Resolve<ILogger>();
logger2.Log("Test");
Hope this helps.
David Hayden