public void Invalid()
{
Assert.That(ValueSetter.CanSetValue(this, "x"), Is.False);
ValueSetter setter = ValueSetter.GetValueSetter(this, "x");
Assert.That(setter.CanSetValue(), Is.False);
Assert.Throws(typeof(InvalidOperationException), delegate { setter.GetValueType(); });
Assert.Throws(typeof(InvalidOperationException), delegate { setter.SetValue(null); });
}