void OnEndAppearAnimation(BaseAnimationInfo info)
 {
     if (ShouldHide)
     {
         Hide();
         OpenedForms.Remove(this);
     }
     ShouldHide = false;
 }
 protected override void OnClosed(EventArgs e)
 {
     base.OnClosed(e);
     OpenedForms.Remove(this);
 }