Garth,
Thanks for all those links, they are various ways around my problem and I will certainly follow them up.
However, I do not need remote debugging and I am quite happy to deploy the compiled code manually to the pi. So I just want to have a last go to persuade Visual Studio 2010 to
locate the DotNetCore 3.1 SDK modules I have already installed.
I know the folder is in
C:\Program Files\dotnet\sdk\3.1.302
but I don't know which dlls I need to point to, with Visual Studio's "Add Reference" facility.
If there was some way to inspect these dlls to see what classes/methods they contain, I possibly would then have a chance.
Chris