The .Net Core DI supports the ability to specify an implementation factory when registering a dependency. This allows for control over the creation of the dependency that is supplied by the service provided. This is done when registering by using the following extension of the IServiceCollection interface:
public static IServiceCollection AddSingleton<TService, TImplementation>(this IServiceCollection services, Func<IServiceProvider, TImplementation> implementationFactory)
where TService : class
where TImplementation : class, TService;
The AddSingleton extension receives both a class to be registered as well as the class to be supplied when the dependency is required. An interesting thing to note is the .Net Core DI framework will maintain the registered services and either deliver the implementation when requested...
