public ConferenceSurveyViewModel (IRepository repository)
		{
			_repository = repository;

			_surveyResult = new ConferenceSurveyResult ();

			ConferenceEvaluationRating = 0;
			ConferenceLengthRating = "";
			MostValuableTracks = new List<string> ();
			ConferenceSurveyComments = "";
		}
		public void SaveConferenceSurveyResult (ConferenceSurveyResult result)
		{
			throw new NotImplementedException ();
		}