private void DeleteRecordingActProperty() {
      int recordingActId = int.Parse(GetCommandParameter("recordingActId"));
      int propertyId = int.Parse(GetCommandParameter("propertyId"));

      RecordingAct recordingAct = this.recording.GetRecordingAct(recordingActId);
      Property property = Property.Parse(propertyId);
      recordingAct.RemoveProperty(property);
    }
    private void DeleteAnnotation() {
      int recordingActId = int.Parse(GetCommandParameter("recordingActId"));
      int propertyId = int.Parse(GetCommandParameter("propertyId"));

      RecordingAct recordingAct = RecordingAct.Parse(recordingActId);
      Property property = Property.Parse(propertyId);

      recordingAct.RemoveProperty(property);
    }