public void FromProperty ()
{
var pi = str_len;
var i = new XamlMemberInvoker (new XamlMember (pi, sctx));
Assert.AreEqual (pi.GetGetMethod (), i.UnderlyingGetter, "#1");
Assert.IsNull (i.UnderlyingSetter, "#2");
Assert.AreEqual (5, i.GetValue ("hello"), "#3");
}