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NI845x and C#: NI Package Manager indicates "installed", BUT not in Visual Studio Reference selections

NI Package Manager indicates NI-845x v21.3.0 is installed.

Ni845x.dll is in C:\Windows\System32.


Visual Studio 2019 does NOT offer anything with NI845x as a Reference for adding to a C# project.

Attempts to browse and install either ni845x.dll or ni845x.lib result in "A reference [...] could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component.".


Examples and instructions for use advise to "add to project...", with no explanation (including what name to look for).


Please advise known reasons for not finding a Reference, when installation software indicates the driver was installed successfully.


Thank you!

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