Question

How can I go about closing a Child form if it’s already open? And if it isn’t already open, then open it?

Thank you

I already have this code, which doesn’t work, obviously:

Form ibx = new inbox();
if(ibx.Visible)
ibx.Dispose();
else
ibx.Show();

All that the above does is creates a new form whether or not it’s already open.

Answer 1

private Form frm;
public void ToggleForm() {
  if(frm == null) {
    frm = new Form();
    frm.Show();
  }
  else {
    frm.Close();
    frm = null;
  }
}