If you're not sure which kind of project your Solution is currently using, first look at the icon beside your common project in Solution Explorer: If it's two overlapping diamonds, you have a Shared ...

This will create a new Class Library project in Visual Studio 2022. We’ll use this project in the subsequent sections of this article. Create model classes in .NET 6.

Can VSExpress create Class Library projects?<BR><BR>If so, put Database.cs in a new Class Library project; compile that, then put the .dll that results into the web site's "bin" directory.<BR><BR ...