public void ChangeElevation(double elevation)
 {
     if (elevation > 0)
     {
         _toolbar.Elevate(elevation);
     }
     else
     {
         _toolbar.Elevate(0);
     }
 }
 public void ChangeHasShadow(bool hasShadow)
 {
     _toolbar.Elevate(hasShadow ? 8 : 0);
 }