Calling/Connecting .NET functions from a COM executable using the new 8.0 .NET in Acad 2025

[cadtown]

 Up until Autocad 2024 versions, we used to be able to create TLB & DLL to connect/call net dll functions from COM executable using old 4.8 Framework by checking "Register for COM Interop" checkbox under the Compile section    in Visual Studio.  

But it looks like that option is no longer available after migrating from .NET 4.8 to 8.0 .NET.

Is there another way to call/connect a NET dll from a COM exe application with something like "acadApp.GetInterfaceObject("getNetFunctions.ComClass1")" ?..

Thanks in advance for your reply.

[norman.yuan]

With .NET Core (.NET8 for Acad2025), exposing .NET component to COM became a bit more difficult than with .NET Framework. You may want to read this:

https://learn.microsoft.com/en-us/dotnet/core/native-interop/expose-components-to-com 

BTW, I'd think it is not worth the trouble doing it in most, if not all, cases.

[cadtown]

Thanks for the information.

As you said it may not be worth for the trouble, and I wish Autodesk (or someone else) will come up with a tool/utility to generate the target TLB file by combining all the steps from the provided link.  Thanks anyway.