public void ContainsTest(float x, float y, float width, float height)
{
RectangleF rect = new RectangleF(x, y, width, height);
float X = (x + width) / 2;
float Y = (y + height) / 2;
PointF p = new PointF(X, Y);
RectangleF r = new RectangleF(X, Y, width / 2, height / 2);
Assert.False(rect.Contains(X, Y));
Assert.False(rect.Contains(p));
Assert.False(rect.Contains(r));
}