C# : Dependency Injection in C# using Autofac

• Autofac: Dependency Injection framework for C# :

Other DI frameworks for dot net platform (Alternatives of AutoFac ):

Below are some features of Autofac:

Definition: 

Application Refactoring:  

Installation :

AUTOFAC MODULARITY FEATURE:

Examples :

• InstancePerDependency()

Configure the component so that every dependent component or call to Resolve()

gets a new, unique instance (default).

builder.RegisterType<BlogSearcher>().As<IBlogSearcher>().InstancePerDependency();

• SingleInstance()

Configure the component so that every dependent component or call to Resolve()

gets the same, shared instance.

builder.RegisterType<BlogSearcher>().As<IBlogSearcher>().SingleInstance();

• InstancePerLifetimeScope()

Configure the component so that every dependent component or call to Resolve()

within a single ILifetimeScope gets the same, shared instance. 

Dependent components in different lifetime scopes will get different instances.

builder.RegisterType<MvcContext>().As<IMvcContext>().AsSelf().InstancePerLifetimeScope();

• InstancePerRequest()

Share one instance of the component within the context of a single web/HTTP/API

request. 

Only available for integration that supports per-request dependencies

(e.g., MVC, Web API, web forms, etc.).

builder.RegisterType<Glass.Mapper.Sc.Web.RequestContext>().As<Glass.Mapper.Sc.Web.IRequestContext>().AsSelf().InstancePerRequest();

That's all folks :)