Unity

Unity is the name of the DI container that is being built for Enterprise Library 4 - yeap, finally Microsoft is getting strong naming for their products, it was born as DIAB, DI Application Block.

Here's a typical usage scenario:

UnityContainer container = new UnityContainer()
                  .Register<ILogger, TraceLogger>()
                  .Register<ISomething, Something>()
                  .Register<ISomethingElse, SomethingElse>();

ILogger logger = container.Get<ILogger>();

logger.Write("log something", new string[] {"category1", "category2"});

A little more verbose version of the factory abstraction, but definitely a clear one. But above all:

It opens up the software factories and Enterprise Library to something other than ObjectBuilder and allow us to use our DI Tool of choice - whether that be the DIAB or another tool.