Merge multiple CsWinRT components together to reduce package size

[lyf6lyf]

I am migrating a MFC C++ app to C#. I need to migrate several C++ components.
I follow https://github.com/MichalStrehovsky/CppPublishAotReference to enable AOT.

It works well for the first component.

If I do same thing for the 2nd component, there will be two component dlls. Both of them contains the DotNet runtime code.

How can I merge the components into one dll, so that they can share the runtime code and reduce the package size?

I've tried solutions:

1. Make project A and project B both CsWinRT component, and then let A reference B. It is Failed to build.
2. Make project A CsWinRT component, and let A reference B. project A can be built, but the types in project B are not exported.
3. Make CsWinRT component C, and let C reference A and B. In C, create proxy types for all public types in A and B. It can work, but requires many additional code.

[manodasanW]

There are a couple options. You should be able to do option 1, I am curious what error you got. But you can make use of the CsWinRTMergeReferencedActivationFactories property to make project A act as also the activation factory for Project B by merging them. This does mean to activate Project B types, the implementation DLL would be the Project A DLL. Option 3 can also work with this too I believe without you having to do the work to create proxy types as merging the activation factories would do that.

[lyf6lyf]

@manodasanW I created a sample app here, with option 1 + CsWinRTMergeReferencedActivationFactories . But I am not able to consume ClassB in main.cpp. ClassB is not merged into winrt\LibA.h, and there is no winrt\LibB.h generated.
How can I consume ClassB in the C++ project?

Another question is, how can I consume ClassB in project A?
Previously, I saw the build is failed because I added <CsWinRTIncludes>LibB</CsWinRTIncludes> in project A, so that I can consume ClassB. The error is

error CsWinRT1001: A public type has a namespace ('LibB') that shares no common prefix with other namespaces ('LibA'). All types within a Windows Metadata file must exist in a sub namespace of the namespace that is implied by the file name.

What is the right way to consume ClassB in project A?

[lyf6lyf]

Now I tried adding

<CppWinRTDynamicProjectWinMDReferences Include="$(NativeLibraryOutputFolder1)\LibB.winmd">
    <WinMDPath>$(NativeLibraryOutputFolder1)\LibB.winmd</WinMDPath>
</CppWinRTDynamicProjectWinMDReferences>

to the C++ project commit. IT generates winrt\LibB.h and I can use it in the C++ project.
But when I run it, I got a winrt::hresult_class_not_available error. It seems ClassB is not in LibA.dll.