Hi,
Welcome to MSDN forum.
Did you install office/office tools for visual studio on win10?
In the solution explorer->add reference->look for it under COM.
https://stackoverflow.com/questions/21986323/cannot-find-microsoft-office-interop-visual-studio
Besides, Visual Studio installs these copies of Primary interop assemblies to the following locations on the development computer:
%ProgramFiles%\Microsoft Visual Studio xx.0\Visual Studio Tools for Office\PIA\Office14
(or %ProgramFiles(x86)%\Microsoft Visual Studio xx.0\Visual Studio Tools for Office\PIA\Office14 on 64-bit operating systems)
%ProgramFiles%\Microsoft Visual Studio xx.0\Visual Studio Tools for Office\PIA\Office15
(or %ProgramFiles(x86)%\Microsoft Visual Studio xx.0\Visual Studio Tools for Office\PIA\Office15 on 64-bit operating systems)
visual studio 2017: %ProgramFiles(x86)%\Microsoft Visual Studio\Shared\Visual Studio Tools for Office\PIA\Office1x
Best regards,
Joyce
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