private void detach_Zach(Zach entity)
		{
			this.SendPropertyChanging();
			entity.Student = null;
		}
		private void attach_Zach(Zach entity)
		{
			this.SendPropertyChanging();
			entity.Student = this;
		}
 partial void UpdateZach(Zach instance);
 partial void DeleteZach(Zach instance);
 partial void InsertZach(Zach instance);