c# open a new form then close the current form?

private void buttonNextForm(object sender, EventArgs e)
{
    NextForm nf = new NextForm();//Object of the form that you want to open
    this.hide();//Hide cirrent form.
    nf.ShowModel();//Display the next form window
    this.Close();//While closing the NextForm, control will come again and will close this form as well
}