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ASP.NET Core hosting model support

This article contains information about what ASP.NET Core hosting models are supported.

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InProcess vs OutOfProcess

InProcess

InProcess is default hosting model for ASP.NET Core applications on IIS. Applications are hosted directly within IIS application pool and run in same process as IIS worker process (w3wp.exe). In this case IIS server is responsible for launching and managing ASP.NET Core process as part of its own process. This means that ASP.NET Core and IIS share the same process and memory space which improves performance and efficient resource management.

OutOfProcess

In OutOfProcess mode applications run outside of IIS process. This configuration provides greater isolation and independence from IIS. Any request made to IIS is reverse-proxyed to Kestrel server. OutOfProcess allows applications to run on non-Windows platforms and provides better deployment flexibility.

Finding out what model my application uses?

AspNetCore_HostingModel.png

In Control panel you can show current hosting model settings of your application and you can easily change them.

Supported scenarios on our hosting

InProcess

In InProcess model is supported ASP.NET Core applications in both cases, whether application is hosted as EXE runtime or as DLL library.

1) Hosted as DLL library in InProcess - supported ASPNET_hostingmodel_inprocess_DLL_3.png

2) Hosted as EXE binary in InProcess - supported ASPNET_hostingmodel_inprocess_EXE_3.png

OutOfProcess

In OutOfProcess model is supported ASP.NET Core applications hosted only as DLL library.

1) Hosted as DLL library in OutOfProcess - supported ASPNET_hostingmodel_outofprocess_DLL_.png

2) Hosted as EXE binary in OutOfProcess - not supported ASPNET_hostingmodel_outofprocess_EXE_3.png

If you try to run application hosted as EXE runtime in OutOfProcess mode your application will be suspended after startup with error Application Pool is disabled. In this case, you must open Support Ticket to re-enable your application.

How to change OutOfProcess -> InProcess in Visual studio?

Open .csproj file or right-click on the project file and select Edit Project.

Change this line ->

<AspNetCoreHostingModel>OutOfProcess</AspNetCoreHostingModel>

To this line –>

<AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
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