/// <summary>
 /// Raises the property changed event in the mock object
 /// </summary>
 /// <param name="mock">Mock instance to use</param>
 /// <param name="propertyName">Property name to use in the event</param>
 public static void RaisePropertyChanged(this INotifyPropertyChanged mock, string propertyName)
 {
     mock.Raise(mo => mo.PropertyChanged += null, mock, new PropertyChangedEventArgs(propertyName));
 }