COMInterop attach to multiple instances of same ClassID

Question

I have read a lot of articles of how to "connect" (COMInterop) to all instances of an object in running processes.
However all these articles describe methods using RunningObjectTable and IMoniker to get the "System.__ComObject" for each running object, but the objects are actually the same.

This simple console solution clearly shows that they are indeed the same: https://1drv.ms/u/s!AoFGuPCXh0GgidYQmv_Zmzvm1uY12A?e=bwfbwb

I am using Office 2016, 32 bits and .Net 5

The linked solution is specifically trying to get objects from 2 different instances of excel process created by the program (csv files used for anonymization).
The result would be the same if the processes were created manually (alt-Excel) instead of programmatically.
Be sure that no other Excel processes are running when this program runs.

There "must" be a way of getting com objects for each of these process.
Is it? How?

Answer 1

@EuroEager2008 , based on my test, I have understood your question.

First, I want to mention that GetRunningObjectTable Method means that Returns access to the Running Object Table (ROT) relevant to this binding process.
Therefore, One process will return one System.__ComObject.

Second, I noted that there is only one process even if I open two instances of excel. You can check it in the Task Manager->Details->Excel.exe.

Finally, One excel process will only return one Comobject.

Hope my explanation can help you.

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