public void EqualsObjectFalse()
    {
        var c  = new Point2double(1, 1);
        var e1 = new Ellipse2double(c, 2, 1);
        var e2 = new Ellipse2double(c, 2, 2);

        Assert.False(e1.Equals((object)e2));
    }
    public void EqualsEllipse2doubleTrue()
    {
        var c  = new Point2double(1, 1);
        var e1 = new Ellipse2double(c, 2, 1);
        var e2 = new Ellipse2double(c, 2, 1);

        Assert.True(e1.Equals(e2));
    }