C# argomento /setup forms

        [STAThread]
        static void Main(string[] args)
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            if (args != null && args.Length > 0)
            {
                switch (args[0].ToUpper())
                {
                    case "SETUP":
                    case "/SETUP":
                        FormSetup f = new FormSetup();
                        f.ShowDialog();

                        //--- oppure se vuoi lanciare solo quella
                        //Application.Run(f);
                        //return;
                        break;

                    default:
                        
                        break;
                }
            }

            //--- lancio la form principale
            Application.Run(new MainForm());
        }
    }