ASP.NET Core Hosting Models | Part – 1 | | Dot Net Tutorials | Pranaya Rout | Day 5

What is the Hosting Model in ASP.NET Core?
In ASP.NET Core, the “Hosting Model” refers to how the application is hosted and executed. The hosting model defines how the application starts, requests are processed, and responses are returned to clients. ASP.NET Core has two types of Hosting Models: InProcess and OutOfProcess.

What is the InProcess Hosting Model in ASP.NET Core?
In the case of the InProcess Hosting Model, the ASP.NET Core Web Application will be hosted inside of the IIS Worker Process, i.e., w3wp.exe, and IIS is the only Web Server going to handle the Incoming HTTP Request.

In ASP.NET Core, hosting refers to the process of running your web application and making it accessible over the internet or intranet. InProcess hosting is one of the hosting options available in ASP.NET Core, which allows you to run your application within the same process as the IIS (Internet Information Services) web server.

In InProcess hosting, the ASP.NET Core application runs as a part of the IIS worker process. This means that the application code and the IIS worker process share the same memory space. This hosting model performs better than OutOfProcess hosting because it eliminates communication overhead between the web server and the application process.

What is Kestrel Web Server?
As we already discussed, ASP.NET Core is a Cross-Platform framework. It means it supports developing and running applications on different operating systems such as Windows, Linux, or MacOS.

The Kestrel is the Cross-Platform Web Server for the ASP.NET Core Web Application. That means this Server supports all the platforms and versions that the ASP.NET Core Supports. By default, it is included as the Internal Web Server in the .NET Core application.

But if you want, then you can also use this as the Internet Facing Web Server, i.e., External Web Server. In this case, the Kestrel Web Server is used as an Edge Server, i.e., the internet-facing web server, which will directly process the incoming HTTP request from the client. In the case of the Kestrel web server, the process name that is used to host and run the ASP.NET Core application is nothing but the project name.

Kestrel is a lightweight, cross-platform web server built specifically for ASP.NET Core applications. It’s designed to be a fast, scalable, and efficient web server that can handle incoming HTTP requests and serve content to clients. Kestrel is the default web server that comes with ASP.NET Core, and it can be used standalone or in combination with other web servers like IIS or Nginx.

What is the ASP.NET Core InProcess Hosting Model?
Let’s first have a look at the InProcess Hosting Model before proceeding to the Out of Process Hosting Model in the ASP.NET Core Web Application. As we already discussed, if we use IIS Express Profile while launching the application, it will use In Process Hosting by default. If we use the Application Name as the Launch Profile in Visual Studio, it will use the Out of Process Hosting using Kestrel Server.

Text Document Links:
ASP.NET Core InProcess Hosting Model: https://dotnettutorials.net/lesson/asp-net-core-inprocess-hosting/
Kestrel Web Server in ASP.NET Core: https://dotnettutorials.net/lesson/kestrel-web-server-asp-net-core/
ASP.NET Core OutOfProcess Hosting: https://dotnettutorials.net/lesson/asp-net-core-outofprocess-hosting/

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