public void TestElementWithExtraAttributes()
{
var elem = new VoiceResponse();
elem.SetOption("newParam1", "value");
elem.SetOption("newParam2", 1);
Assert.AreEqual(
"<?xml version=\"1.0\" encoding=\"utf-8\"?>" + Environment.NewLine +
"<Response newParam1=\"value\" newParam2=\"1\"></Response>",
elem.ToString()
);
}