Per Container Lifetime
Per Container lifetime allows a registration of an existing or resolved object as a scoped singleton in the container it was created or registered. In other words this instance is unique within the container it was registered with. Child or parent containers could have their own instances registered for the same contract.
Unity returns the same instance each time the
Resolve method is called or when the dependency mechanism injects the instance into other classes.
The Lifetime Manager
Per container lifetime is controlled by ContainerControlledLifetimeManager type. This lifetime manager effectively implements a singleton behavior for objects registered with a particular container.
Per container lifetime is supported by all registration types
To create a Type registration with per container lifetime:
to register a factory:
container.RegisterFactory<IService>((c, t, n) => new Service(), FactoryLifetime.PerContainer);
or to register an instance:
var instance = new Service(); container.RegisterInstance<IService>(instance, InstanceLifetime.PerContainer);