I need a great logic for three forms

Question

Hi!

 

I have three forms (frm1, frm2 and frm3).

 

The frm1 is the main form. I need when open the frm2, the frm1 should be always open (just because it's the main from one). When I finish to use the frm2 I can go to frm3 without seeing my frm1 be closed. But I would like when I close the frm2 then later the frm3. It's should be closed totally (not hide). But the frm1 still open (only close when I want).

 

See what I do try to do. But nothing. I went also to google... Many logic doesnt help me.

/////I open the frm2////////////// But the frm1 still open at the back

frm2 password = new frm2();

password.ShowDialog(); 

/////Later I click on a button to get in frm3. The frm2 should close totally//// 

frm3 finance = new frm3();

finance.ShowDialog();

This.Close()//This is for the form2. Then when I finish to use the form3 I can close and I need to see the main form (frm1) open.

 

Small think but I can not resolv it properly. Please I need help. Thank you.