public void TestRaiseProperty()
{
var viewmodel = new TestViewModel();
String rPropertyName = null;
viewmodel.PropertyChanged += (s, e) => rPropertyName = e.PropertyName;
viewmodel.CallRaisePropertyChanged("TestProperty");
Assert.Equal("TestProperty", rPropertyName);
rPropertyName = null;
viewmodel.CallRaisePropertyChanged(() => viewmodel.PropertyOne);
Assert.Equal("PropertyOne", rPropertyName);
}