Question

I would like to write a common method which would check if a form is already open. If it is open then just activate it. Otherwise show it. Now my challenge is what type of parameter do I pass to the Test method?

private void Test(?? ??)
        {
            bool isFormOpen = false;
            foreach (Form form in Application.OpenForms)
            {
                if (form is ??)
                {
                    isFormOpen = true;
                    form.Activate();
                }
            }
            if (!isFormOpen)
            {

            }
        }

Thanks
Nishant

Answer 1

the way your code is written you need to pass Type of the respective Form class…

           if (form.GetType() == theTypeParam)
            {
                isFormOpen = true;
                form.Activate();
            }

An alternative is to use generice – see the answer from Heinzi for that.