ASP.NET Core is a free and open-source web framework, and the next generation of ASP.NET, developed by Microsoft and the community. It is a modular framework that runs on both the full .NET Framework, on Windows, and the cross-platform .NET Core.

ASP.NET Core (Key Points)

  • ASP.NET Core is a new framework to build and run applications on cross platforms. We can develop and host ASP.NET Core apps in all major OS i.e. Windows, Linux or Mac.
  • ASP.NET Core is basically a Console Application. It’s the main method creates a server or web-host and run this application on that server.
  • There are 3 types of projects in ASP.NET Core. WEB API, ASP.NET Core Razor Pages, ASP.NET Core MVC Style
  • It has StartUp.cs class that is being called by the Main method of console application.
  • StartUp.cs class is a start-up class that is being invoked when the application runs the first time.
  • It has mainly two methods ConfigureServices & Configure & one constructor.
  • ConfigureService – You can use this method to configure services. i.e. ASP.NET Core’s default Dependency Injection.
  • Configure – You can use this method register Middleware components in your application request pipeline. i.e. Cookie Based Authentication, Token Based Authentication, Logging, ExceptionHandling, RouteHandling etc.
  • ASP.NET Core removes the concept of using System.Web and HTTP Modules to be a part of it’s request pipeline & it becomes possible due to the concept of Middleware.
  • Request Delegates or Middleware Components should be registered in Configure Method.
  • Request Delegates or Middleware Component will use extension methods i.e. Run, Use & Map. These may be anonymous methods also. (Extension Method of IApplicationBuilder class)
  • In ASP.NET Core, Middleware is the replacement of HTTP Modules in ASP.NET 4.x or below.
  • OWIN is a Middleware for ASP.NET. A replacement of HTTP Modules.
  • KATANTA is a project that contains many OWIN Middleware Components that has been developed by Microsoft team.
  • The goal of OWIN is decoupling web applications from IIS. With the help of OWIN Middleware Components, the app will not rely on System.Web dll and HTTP Modules.

Few Important Links