public void SlideThumbTest()
{
var slider = GetSlider();
var thumb = slider.Thumb;
var oldPos = thumb.Properties.BoundingRectangle.Value.Center();
thumb.SlideHorizontally(50);
UtilityMethods.AssertPointsAreSame(thumb.Properties.BoundingRectangle.Value.Center(), new Point(oldPos.X + 50, oldPos.Y), 1);
}