I\'ve created a class that extends DbConnection in a brand new project.
public class FakeDbConnection : DbConnection { ... }
In the Solutio
Thats because DBConnection inherits "Component". About disabling VS to add "Subtype" in csproj-file - I don't think thats possible.
You can still aceess the code, by right-clicking in designer -> show code (I think "F7" is the shortcut key for that)