public void CanRegisterType()
{
RegionBehaviorFactory factory = new RegionBehaviorFactory(null);
factory.AddIfMissing("key1", typeof(MockRegionBehavior));
factory.AddIfMissing("key2", typeof(MockRegionBehavior));
Assert.AreEqual(2, factory.Count());
Assert.IsTrue(factory.ContainsKey("key1"));
}