partial void DeleteVacancy(Vacancy instance);
 partial void UpdateVacancy(Vacancy instance);
		private void detach_Vacancies(Vacancy entity)
		{
			this.SendPropertyChanging();
			entity.Project = null;
		}
 partial void InsertVacancy(Vacancy instance);
		private void attach_Vacancies(Vacancy entity)
		{
			this.SendPropertyChanging();
			entity.Project = this;
		}