private void pageContainer_SelectedPageChangedUsingNo(object sender, EventArgs e)
        {
            if (pageContainer.SelectedPage != null)
            {
                HeaderText = pageContainer.SelectedPage.Text;
            }

            if ((e as AeroWizard.SelectedPageEventArgs) != null)
            {
                SelectedPageChangedUsingNo.Invoke(this, new SelectedPageEventArgs {
                    IsPrevious = true
                });
            }
            else
            {
                OnSelectedPageChangedUsingNo();
            }
        }
 protected void OnSelectedPageChangedUsingNo()
 {
     SelectedPageChangedUsingNo?.Invoke(this, EventArgs.Empty);
 }