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I'm trying to add an ASP.NET Core Web API to my application, so external apps can query its in-memory data, although its complaining about missing files on my system.

I installed the Microsoft.AspNet.WebApi.OwinSelfHost package and added this code:

var config = new HttpSelfHostConfiguration("http://localhost:8080");

Now I get this error:

Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified.

File name: 'System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

If I install package System.ServiceModel.Primitives, then I get:

Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'System.ServiceModel.Http, Version=4.10.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'System.ServiceModel.Http, Version=4.10.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a

If I install System.ServiceModel.Http then I get:

Unhandled exception. System.TypeLoadException: Could not load type 'System.ServiceModel.HostNameComparisonMode' from assembly 'System.ServiceModel, Version=4.0.0.0,

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This is because there is no the System.ServiceModel.dll version currently for the ASP.NET-Core that contain the HostNameComparisonMode type.

If you go to HostNameComparisonMode Enum page in the Microsoft documentation and select .NET 5, for example, you will receive the following message:

The requested page is not available for .NET 5. You have been redirected to the newest product version this page is available for.

The same for .NET 6/7/8.

NOTE: If you will compile the a project for the .Net Framework 4.8 than the following declaration will appear in the System.ServiceModel.dll:

enter image description here

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