public void TestSetNullProperty()
{
ActiveMQMessage msg = new ActiveMQMessage();
string name = "cheese";
msg.Properties.SetString(name, "Cheddar");
Assert.AreEqual("Cheddar", msg.Properties.GetString(name));
msg.Properties.SetString(name, null);
Assert.AreEqual(null, msg.Properties.GetString(name));
}