/WINMDKEYFILE (Specify winmd Key File)
Specifies a key or a key pair to sign a Windows Runtime Metadata (.winmd) file.
/WINMDKEYFILE:filename
Remarks
Resembles the /KEYFILE linker option that is applied to a .winmd file.
To set this linker option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see Set C++ compiler and build properties in Visual Studio.
Select the Configuration Properties > Linker > Windows Metadata property page.
In the Windows Metadata Key File box, enter the file location.