Best practices for multi-form applications to show and hide forms? [closed]

Answer 1

I use this trick. Lets say form1 is the main form:

private void button1_Click(object sender, EventArgs e)
{
     LoadForm(new Form2());
}

private void LoadForm(Form frm)
{
    frm.FormClosed += new FormClosedEventHandler(frm_FormClosed);
    this.Hide();
    // Here you can set a bunch of properties, apply skins, save logs...
    // before you show any form
    frm.Show();
}

void frm_FormClosed(object sender, FormClosedEventArgs e)
{
    this.Show();
}

Therefore; when you open any form closed (except form1), form1 will reappear again.

Update

using (Form2 frm = new Form2())
{
    if (frm.ShowDialog() = DialogResult.ok)
    {
        //Do some things...
    }
}

In this case there is no need to hide previous form.