Entity Framework Core - Knowledge Base (KB)

How to handle "No connection string named 'RestaurentEntities' could be found in the application config file" in WinForms

I hope you all will be fine. ...I am trying a project on WinForms. I made a Form name ...Dashboard... and User Control name ...DashboardScreen.... ...Dashboard... basically will have many User Controls on it like ...DashboardScreen..., ...InventoryScreen...