foreach (ProcessView processView in ((Control)sender).Controls)

            List<Connector> remove = new List<Connector>();
            Connector c = new Connector();
            remove.Add(c);

        void testCastOnControlVariables()
        {
            Button buttonTest = new Button();
            String nameOfButton;
            nameOfButton = ((Control)buttonTest).Name;
        }

        void testAddOnList()
        {
            List<string> remove = new List<string>();
            remove.Add("Chocolate cookies");    // here "Add" is underlined as a mistyped symbol
            List<string> foodNames = new List<string>();
            foodNames.Add("Chocolate bars");    // no underlining here
        }

internal static void xxx(Control parent)
        {
            foreach (ProcessView processView in ((Control)parent).Controls)
                ;
        }

internal static void xxx(Control parent)
        {
            foreach (ProcessView processView in parent.Controls)
                ;
        }