What is ASP.NET Core InProcess Hosting

 In ASP.NET Core, hosting can be done either in-process or out-of-process. In-process hosting means that the web server that runs the ASP.NET Core application is hosted within the same process as the application. This can provide better performance and lower resource usage compared to out-of-process hosting, but it also means that the application and web server share the same process, which can introduce some security concerns.

To use in-process hosting in ASP.NET Core, you need to use the IIS server or the HTTP.sys server. Here's how to configure in-process hosting using IIS:

1. Install the IIS server: Install the IIS server on the machine where the ASP.NET Core application will be hosted.
2. Install the ASP.NET Core Module: Install the ASP.NET Core Module for IIS on the machine where the ASP.NET Core application will be hosted. This module is used to host ASP.NET Core applications in IIS.
3. Configure the application pool: Create an application pool in IIS and configure it to use .NET Core CLR. You can also set other options, such as the managed pipeline mode and the identity.
4. Create a site: Create a site in IIS and configure it to use the application pool that you created in the previous step. You can also specify the physical path of the application files.
5. Publish the application: Publish the ASP.NET Core application using the Visual Studio or the dotnet CLI. The application should be published to a folder on the file system.
6. Add the application to IIS: In IIS, add the ASP.NET Core application as a virtual directory or an application. Specify the physical path of the published application files.
7. Configure the web.config file: In the root directory of the ASP.NET Core application, create a web.config file and configure it to use in-process hosting. Here's an example of a simple web.config file:

In this example, the web.config file configures the ASP.NET Core Module to use in-process hosting. The processPath attribute specifies the path to the dotnet executable, and the arguments attribute specifies the path to the ASP.NET Core application DLL. The stdoutLogEnabled and stdoutLogFile attributes specify whether to enable logging and the path to the log file.

Overall, in-process hosting can provide better performance and lower resource usage compared to out-of-process hosting, but it requires some additional configuration and may introduce some security concerns.