Open a new Winforms project. Add something to the automatically generated form1.cs. Now choose add new item to the project and when the dialog opens, choose windows forms, inherited form (name it form2), and then select form1. You will add a subclass of form1 to your project named form2. Which you can modify at will.Have you used VI? If so, did you run into localization issues when you "modified at will?"
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1