public void InsetRect()
{
var i = new UIEdgeInsets(10, 20, 30, 40);
var r = new RectangleF(1, 2, 3, 4);
r = i.InsetRect(r);
Assert.That(r.X, Is.EqualTo((nfloat)21f), "X");
Assert.That(r.Y, Is.EqualTo((nfloat)12f), "Y");
Assert.That(r.Width, Is.EqualTo((nfloat)(-57f)), "Width");
Assert.That(r.Height, Is.EqualTo((nfloat)(-36f)), "Height");
Assert.False(i.Equals(UIEdgeInsets.Zero), "Equals(UIEdgeInsets)");
Assert.False(UIEdgeInsets.Zero.Equals((object)i), "Equals(object)");
}