I’m unable to connect Visual Studio Community 2019 to Virtuoso Datasource because the OpenLink Virtuoso Data Source driver doesn’t show up on visual studio as described in the link 2.6. Virtuoso ADO.Net Data Grid Form Application
Currently, you best route into Virtuoso from Visual Studio (irrespective of version or variant) is via the Microsoft-provided ADO.NET to ODBC Bridge.
Remember, ODBC is one of Virtuoso’s native call level interfaces for Client App & Service interactions.
I hope this helps.