Same form open by a different button of different form

[vivekagrawal]

I have three form form1, form2, form3. in form one a button opens form3. and in form2 also a button for opening the same form as form3. Is it possible and how? becoz when i was simply chen this code for open form this form this was not working.
there was error "best overload method match for form3.

[ddanbe]

You can click the following code as many times as your computer memory will allow it.
You will have as many forms.

private void button1_Click(object sender, EventArgs e)
        {
            Form f = new Form();
            f.Show();
        }

[vivekagrawal]

i have use this but the error is does not contain a constructor that takes 0 argument. this error is in both form 1 and form 2.

[Mitja Bonca]

You dont need any constructor. At least if you open form2 from from1 (or form3 from form1).

[ddanbe]

Show your code.

[Mitja Bonca]

Maybe you have any parameter(s) in the constructor on form3 (form2). If you have it, and you dont need to pass any from form1 you do:

Form3 f3 = new Form3(null);
f3.Show();

[vivekagrawal]

This is working but i want fill some data from form 3 to form1 and form2 then error is coming
does not contain a constructor that takes 1 argument

[Mitja Bonca]

Did you see my example I did it for you? Thats the example you hav to follow.
You know, when you selected a doctor in the dataGridView, and the his name and Id is passed from that form to the main one (so backwards).
Check ans study that example. The answer lays there.

[vivekagrawal]

@ mitja if want to use this data grid view form in other form then what i do?